# Patent

## Title
Silanyl phenols and naphthols

## Abstract

There are described silanyl phenols and naphthols of formula (1a) or (1b), wherein R1 is hydrogen; halogen; hydroxy; C1–C20alkyl; C3–C12cycloalkyl; C1–C20alkoxy; trifluoromethyl; pentafluoroethyl; mono- or di-C1–C5alkylamino; hydroxy-C1–C5alkyl; or phenyl, phenyl-C1–C20alkyl, phenoxy, phenyl-C1–C20alkoxy, naphthyl or naphthyl-C1–C20alkyl each unsubstituted or substituted by C1–C5alkyl, C3–C12cycloalkyl, C1–C5alkoxy, C3–C12cycloalkoxy, halogen, oxo, carboxy, carboxy-C1–C7alkyl ester, carboxy-C3–C12cycloalkyl ester, cyano, trifluoromethyl, pentafluoroethyl, amino, N,N-mono- or di-C1–C20alkylamino or by nitro; R2, R3 and R4 are each independently of the others hydrogen; C1–C20alkyl; or C3–C12-cycloalkyl; R5, R6 and R7 are each independently of the others C1–C20alkyl, C5–C10aryl, C1–C20alkoxy, phenyl-C1–C20alkyl, phenyl-C1–C20alkoxy, C2–C5alkenyl, —O—Si—(C1–C5alkyl)3; or O—Si—(C1–C5alkyl)2-O—Si(C1–C5alkyl)3 and n is 0 or 1. The compounds exhibit a pronounced activity against Gram positive and Gram negative bacteria, and also against yeasts and moulds

## Background
The present invention relates to selected silanyl phenols and naphthols, to the preparation of such compounds, to the use of such compounds for the antimicrobial treatment of surfaces, as antimicrobial active ingredients against Gram-positive and Gram-negative bacteria, yeasts and fungi and in the preservation of cosmetics, household products, textiles, plastics, and for use in disinfectants.
The compounds according to the invention correspond to the formula




wherein

    R1 is hydrogen; halogen; hydroxy; C1–C20alkyl; C3–C12cycloalkyl; C1–C20alkoxy; trifluoromethyl pentafluoroethyl; mono- or di-C1–C5alkylamino; hydroxy-C1–C5alkyl; or phenyl, phenyl-C1–C20alkyl, phenoxy, phenyl-C1–C20alkoxy, naphthyl or naphthyl-C1–C20alkyl each unsubstituted or substituted by C1–C5alkyl, C3–C12cycloalkyl, C1–C5alkoxy, C3–C12cycloalkoxy, halogen, oxo, carboxy, carboxy-C1–C7alkyl ester, carboxy-C3–C12cycloalkyl ester, cyano, trifluoromethyl, pentafluoroethyl, amino, N,N-mono- or di-C1–C20alkylamino or by nitro;
    R2, R3 and R4 are each independently of the others hydrogen; C1–C20alkyl; or C3–C12-cycloalkyl;
    R5, R6 and R7 are each independently of the others C1–C20alkyl, C5–C10aryl, C1–C20alkoxy, phenyl-C1–C20alkyl, phenyl-C1–C20alkoxy, C2–C5alkenyl, —O—Si—(C1–C5alkyl)3; or —O—Si—(C1–C5alkyl)2-O—Si(C1–C5alkyl)3 and
    n is 0 or 1,

there not being included compounds of formula (1a) wherein

    R1, R2, R3 and R4 are hydrogen and R5, R6 and R7 are simultaneously methyl.


C1–C20Alkyl denotes straight-chain or branched alkyl radicals, e.g. methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, amyl, isoamyl or tert-amyl, heptyl, octyl, isooctyl, nonyl, decyl, undecyl, dodecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl or eicosyl.
C1–C20Alkoxy denotes straight-chain or branched radicals, e.g. methoxy, ethoxy, propoxy, butoxy, pentyloxy, hexyloxy, heptyloxy, octyloxy, isooctyloxy, nonyloxy, decyloxy, undecyloxy, dodecyloxy, tetradecyloxy, pentadecyloxy, hexadecyloxy, heptadecyloxy, octadecyloxy or eicosyloxy.
C3–C12Cycloalkyl denotes e.g. cyclopropyl, cyclobutyl, cyclopentyl, cycloheptyl, cyclooctyl, cyclononyl, cyclodecyl, cycloundecyl, cyclodocecyl and especially cyclohexyl.
In the context of the definitions given, alkenyl includes inter alia vinyl, allyl, isopropenyl, 2-butenyl, 3-butenyl, isobutenyl, n-penta-2,4-dienyl, 3-methyl-but-2-enyl, n-oct-2-enyl, n-dodec-2-enyl, isododecenyl, n-dodec-2-enyl or n-octadec-4-enyl.
C5-C10Aryl denotes phenyl or naphthyl.
Preference is given to compounds of formula (1a) or (1b), wherein

    R1 is hydrogen; C1–C20alkyl; C1–C20alkoxy; or phenyl, phenoxy, phenyl-C1–C20alkyl, phenyl-C1–C20alkoxy, naphthyl or naphthyl-C1–C20alkyl each unsubstituted or substituted by C1–C5alkyl, C3–C12cycloalkyl, C1–C5alkoxy, C3–C12cycloalkoxy, halogen, oxo, carboxy, carboxy-C1–C7alkyl ester, carboxy-C3–C12cycloalkyl ester, cyano, trifluoromethyl, pentafluoroethyl, amino, N,N-mono- or di-C1–C20alkylamino or by nitro.


Especially preferred compounds of formula (1a) or (1b) are those wherein

    R1 is hydrogen, C1–C20alkyl, C1–C20alkoxy, phenyl, or phenoxy unsubstituted or substituted by halogen, C1–C5alkyl or by cyclo-C5–C7alkyl;

and especially those wherein

    R1 is hydrogen; C1–C20alkyl; C1–C5alkoxy; phenyl or phenoxy.
    R2, R3 and R4 in formula (1 a) or (1b) are preferably each independently of the others hydrogen or methyl.
    R5, R6 and R7 are preferably each independently of the others hydrogen; C1–C20alkyl; C1–C20alkoxy; C2–C5alkenyl; C6–C10aryl; —O—Si(C1–C5alkyl)2-O—Si(C1–C5alkyl)3 or —O—Si—(C1–C5alkyl)3; and especially C1–C5alkyl; C1–C20alkoxy; phenyl; —O—Si(C1–C5alkyl)2-O—Si(C1–C5alkyl)3 or —O—Si—(C1–C5alkyl)3.


Very special preference is given to compounds of formulae




wherin

    R1 is hydrogen; C3–C20alkyl; C1–C5alkoxy; phenyl; or phenoxy,
    R2 is hydrogen; or C1–C5alkyl; and
    R5, R6 and R7 are each independently of the others C1–C5alkyl; phenyl; —O—Si(C1–C5alkyl)2-O—Si(C1–C5alkyl)3; or —O—Si—(C1–C5alkyl)3.


Examples of very especially preferred compounds of the invention correspond to the formulae







The compounds according to the invention are prepared in very general terms by the addition of silanes that contain at least one Si—H bond to phenols or naphthols substituted as desired that have unsaturated side chains (hydrosilylation).
The invention relates also to the process for the preparation of silanyl phenols and naphthols of formulae (1a) and (1b). In the process a phenol or naphthol compound is etherified with an allyl halide (1st step), the resulting alkenyl phenyl ether compound is rearranged to form an alkenylphenyl compound (2nd step), and a silane compound that contains at least one Si—H bond is added to that compound (3rd step) according to the following Scheme:




In that reaction scheme

    R1 is hydrogen; halogen; hydroxy; C1–C20alkyl; C3–C12cycloalkyl; C1–C20alkoxy; trifluoromethyl; pentafluoroethyl; mono- or di-C1–C6alkylamino; hydroxy-C1–C5alkyl; or phenyl, phenyl-C1–C20alkyl, phenoxy, phenyl-C1–C20alkoxy, naphthyl or naphthyl-C1–C20alkyl, each unsubstituted or substituted by C1–C5alkyl, C3–C12cycloalkyl, C1–C5alkoxy, C3–C12cycloalkoxy, halogen, oxo, carboxy, carboxy-C1–C7alkyl ester, carboxy-C3–C12cycloalkoxy ester, cyano, trifluoromethyl, pentafluoroethyl, amino, N,N-mono- or di-C1–C20alkylamino or by nitro;
    R2, R3 and R4 are each independently of the others hydrogen; C1–C20alkyl; or C3–C12-cycloalkyl; and
    R5, R6 and R7 are each independently of the others C1–C20alkyl; C5–C10aryl; C1–C20alkoxy; phenyl-C1–C20alkyl; phenyl-C1–C20alkoxy; C2–C5alkenyl; —O—Si—(C1–C5alkyl)3; or —O—Si—(C1–C5alkyl)2-O—Si(C1–C5alkyl)3.


The hydrosilylation is carried out according to processes known per se in an inert organic solvent, preferably at elevated temperature, in the presence of catalytic amounts of a transition metal complex. Suitable complexes are, for example, generally complexes of the metals rhodium, iridium or cobalt, or especially carbonyls of the metals iron, cobalt, nickel, rhodium, ruthenium, manganese or chromium. Special preference is given to complexes of platinum or hexachloroplafinic acid H2PtCl6.
As starting compounds for the hydrosilylaton there are used alkenyl-phenols or -naphthols, which are prepared according to processes known per se, as described, for example, in Synthesis 1981, 310 for Friedel-Crafts allylation of phenols. The alkenyl-phenols or -naphthols are preferably prepared from readily obtainable alkenyl phenyl ethers by a Claisen rearrangement. The rearrangement reaction can be carried out with or without high-boiling solvents at temperatures of 200–250° C. The rearrangement is preferably carried out in ethylene glycol or its oligomers, or ethers thereof, especially in diethylene glycol dimethyl ether at 220° C. in a pressurised vessel. That procedure results in an especially pure reaction product.
The Invention relates also to compounds of formula




wherein

    R1 is hydrogen; halogen; hydroxy; C1–C20alkyl; C3–C12cycloalkyl; C1–C20alkoxy; trifluoromethyl; pentafluoroethyl; di-C1–C5alkylamino; hydroxy-C1–C5alkyl; or phenyl, phenoxy, phenyl-C1–C20alkyl, phenyl-C1–C20alkoxy, naphthyl or naphthyl-C1–C20alkyl each unsubstituted or substituted by C1–C5alkyl, C3–C12cycloalkyl, C1–C5alkoxy, C3–C12cycloalkoxy, halogen, oxo, carboxy, carboxy-C1–C7alkyl ester, carboxy-C3–C12cycloalkyl ester, cyano, trifluoromethyl, pentafluoroethyl, amino, N,N-mono- or di-C1–C20alkylamino or by nitro;
    R2, R3 and R4 are each independently of the others hydrogen; C1–C20alkyl; or C3–C12-cycloalkyl.


Silanyl phenols and naphthols of formula




wherein

    R1 is hydrogen; halogen; hydroxy; C1–C20alkyl; C3–C12cycloalkyl; C1–C20alkoxy; trifluoromethyl; pentafluoroethyl; mono- or di-C1–C5alkylamino; hydroxy-C1–C5alkyl; or phenyl, phenyl-C1–C20alkyl, phenoxy, phenyl-C1–C20alkoxy, naphthyl or naphthyl-C1–C20alkyl each unsubstituted or substituted by C1–C5alkyl, C3–C12cycloalkyl, C1–C5alkoxy, C3–C12cycloalkoxy, halogen, oxo, carboxy, carboxy-C1–C7alkyl ester, carboxy-C3–C12cycloalkyl ester, cyano, trifluoromethyl, pentafluoroethyl, amino, N,N-mono- or di-C1–C20alkylamino or by nitro;
    R2, R3 and R4 are each independently of the others hydrogen; C1–C20alkyl; or C3–C12cycloalkyl;
    R5, R6 and R7 are each independently of the others C1–C20alkyl, C5–C10aryl, C1–C20alkoxy, phenyl-C1–C20alkyl, phenyl-C1–C20alkoxy, C2–C5alkenyl, —O—Si—(C1–C5alkyl)3; or —O—Si—(C1–C5alkyl)2-O—Si(C1–C5alkyl)3 and
    n is 0 or 1,

exhibit pronounced antimicrobial activity, especially against Gram-positive and Gram-negative bacteria and against bacteria of skin flora, and also against yeasts and moulds. They are accordingly especially suitable in the disinfection, deodorisation and general and anti-microbial treatment of the skin and mucosa and of integumentary appendages (hair), more especially in the disinfection of hands and of wounds.



They are therefore suitable as antimicrobial active ingredients and as preservatives in personal care preparations, for example shampoos, bath additives, hair-care products, liquid and solid soaps (based on synthetic surfactants and salts of saturated and/or unsaturated fatty acids), lotions and creams, deodorants, other aqueous or alcoholic solutions, e.g. cleansing solutions for the skin, moist cleansing cloths, oils or powders.
The invention accordingly relates also to a personal care preparation comprising at least one compound of formula (1c) and cosmetically tolerable carriers or adjuvants.
The personal care preparation according to the invention comprises from 0.01 to 15% by weight, preferably from 0.1 to 10% by weight, based on the total weight of the composition, of the compound of formula (1c), and cosmetically tolerable adjuvants.
Depending on the form of the personal care preparation, it will comprise, in addition to the silanyl phenol or naphthol of formula (1c), further constituents, for example sequestering agents, colourings, perfume oils, thickening or solidifying agents (consistency regulators), emollients, UV absorbers, skin-protective agents, antioxidants, additives that improve mechanical properties, such as dicarboxylic acids and/or Al, Zn, Ca and Mg salts of C14–C22-fatty acids, and optionally preservatives.
The personal care preparation according to the invention may be formulated as a water-in-oil or oil-in-water emulsion, as an alcoholic or alcohol-containing formulation, as a vesicular dispersion of an ionic or non-ionic amphiphilic lipid, as a gel, a solid stick or as an aerosol formulation.
As a water-in-oil or oil-in-water emulsion the cosmetically tolerable adjuvant preferably comprises from 5 to 50% of an oily phase, from 5 to 20% of an emulsifier and from 30 to 90% water. The oily phase may contain any oil suitable for cosmetic formulations, e.g. one or more hydrocarbon oils, a wax, a natural oil, a silicone oil, a fatty acid ester or a fatty alcohol. Preferred mono- or poly-ols are ethanol, isopropanol, propylene glycol, hexylene glycol, glycerol and sorbitol.
Cosmetic formulations according to the invention are used in various fields. For example, the following preparations especially come into consideration:

    
    
        skin-care preparations, e.g. skin-washing and cleansing preparations in the form of tablet-form or liquid soaps, synthetic detergents or washing pastes,
        bath preparations, e.g. liquid (foam baths, milks, shower preparations) or solid bath preparations, e.g. bath cubes and bath salts;
        skin-care preparations, e.g. skin emulsions, multi-emulsions or skin oils;
        cosmetic personal care preparations, e.g. facial make-up in the form of day creams or powder creams, face powder (loose or pressed), rouge or cream make-up, eye-care preparations, e.g. eyeshadow preparations, mascara, eyeliner, eye creams or eye-fix creams; lip-care preparations, e.g. lipstick, lip gloss or lip contour pencils, nail-care preparations, such as nail varnish, nail varnish remover, nail hardeners or cuticle removers;
        intimate hygiene preparations, e.g. intimate washing lotions or intimate sprays;
        foot-care preparations, e.g. foot baths, foot powders, foot creams or foot balsams, special deodorants and antiperspirants or callus-removing preparations;
        light-protective preparations, such as sun milks, lotions, creams, oils, sun blocks or tropicals, pre-tanning preparations or after-sun preparations;
        skin-tanning preparations, e.g. self-tanning creams;
        depigmenting preparations, e.g. preparations for bleaching the skin or skin-lightening preparations;
        insect-repellents, e.g. insect-repellent oils, lotions, sprays or sticks;
        deodorants, such as deodorant sprays, pump-action sprays, deodorant gels, sticks or roll-ons;
        antiperspirants, e.g. antiperspirant sticks, creams or roll-ons;
        preparations for cleansing and caring for blemished skin, e.g. synthetic detergents (solid or liquid), peeling or scrub preparations or peeling masks;
        hair-removal preparations in chemical form (depilation), e.g. hair-removing powders, liquid hair-removing preparations, cream- or paste-form hair-removing preparations, hair-removing preparations in gel form or aerosol foams;
        shaving preparations, e.g. shaving soap, foaming shaving creams, non-foaming shaving creams, foams, gels, preshave preparations for dry shaving, aftershaves or aftershave lotions;
        fragrance preparations, e.g. fragrances (eau de Cologne, eau de toilette, eau de parfum, parfum de toilette, perfume), perfume oils or cream perfumes;
        dental-care, denture-care and mouth-care preparations, e.g. toothpastes, gel toothpastes, tooth powders, mouthwash concentrates, anti-plaque mouthwashes, denture cleaners or denture fixatives;
        cosmetic hair-treatment preparations, e.g. hair-washing preparations in the form of shampoos and conditioners, hair-care preparations, e.g. pre-treatment preparations, hair tonics, styling creams, styling gels, pomades, hair rinses, treatment packs, intensive hair treatments, hair-structuring preparations, e.g. hair-waving preparations for permanent waves (hot wave, mild wave, cold wave), hair-straightening preparations, liquid hair-setting preparations, hair foams, hair sprays, bleaching preparations, e.g. hydrogen peroxide solutions, lightening shampoos, bleaching creams, bleaching powders, bleaching pastes or oils, temporary, semi-permanent or permanent hair colourants, preparations containing self-oxidising dyes, or natural hair colourants, such as henna or camomile.
    
    


An antimicrobial soap has, for example, the following composition:

    0.01 to 5% by weight of the compound of formula (1c),
    0.3 to 1% by weight titanium dioxide,
    1 to 10% by weight stearic acid,
    ad 100% soap base, e.g. the sodium salts of tallow fatty acid and coconut fatty acid or glycerols.


A shampoo has, for example, the following composition:

    0.01 to 5% by weight of the compound of formula (1c),
    12.0% by weight sodium laureth-2-sulfate,
    4.0% by weight cocamidopropyl betaine,
    3.0% by weight NaCl and
    water ad 100%.


A deodorant has, for example, the following composition:

    0.01 to 5% by weight of the compound of formula (1c),
    60% by weight ethanol,
    0.3% by weight perfume oil, and
    water ad 100%.


The invention relates also to an oral composition, comprising

    0.01 to 15% by weight, based on the total weight of the composition, of the compound of formula (1c), and orally tolerable adjuvants.


Example of an oral composition:

    1.0% by weight sorbitol,
    10% by weight glycerol,
    15% by weight ethanol,
    15% by weight propylene glycol,
    0.5% by weight sodium lauryl sulfate,
    0.25% by weight sodium methylcocyl taurate,
    0.25% by weight polyoxypropylene/polyoxyethylene block copolymer,
    0.10% by weight peppermint flavouring,
    0.1 to 0.5% by weight of a compound of formula (1c), and
    48.6% by weight water.


The oral composition according to the invention may be, for example, in the form of a gel, a paste, a cream or an aqueous preparation (mouthwash).
The oral composition according to the invention may also comprise compounds that release fluoride ions which are effective against the formation of caries, for example inorganic fluoride salts, e.g. sodium, potassium, ammonium or calcium fluoride, or organic fluoride salts, e.g. amine fluorides, which are known under the trade name Olafluor.
The silanyl phenols and naphthols of formula (1c) according to the invention are also suitable for the treatment, especially preservation, of textile fibre materials. Such materials are undyed and dyed or printed fibre materials, e.g. of silk, wool, polyamide or polyurethanes, and especially cellulosic fibre materials of all kinds. Such fibre materials are, for example, natural cellulosic fibres, such as cotton, linen, jute and hemp, as well as cellulose and regenerated cellulose. Preferred suitable textile fibre materials are made of cotton.
The silanyl phenols and naphthols according to the invention are also suitable for the treatment of plastics, especially for imparting antimicrobial properties to or preserving plastics, e.g. polyethylene, polypropylene, polyurethane, polyester, polyamide, polycarbonate, latex etc. Fields of use therefore are, for example, floor coverings, plastics coatings, plastics container and packaging materials; kitchen and bathroom utensils (e.g. brushes, shower curtains; sponges, bathmats), latex, filter materials (air and water filters), plastics articles used in the field of medicine, e.g. dressing materials, syringes, catheters etc., so-called “medical devices”, gloves and mattresses.
Paper, for example papers used for hygiene purposes, may also be provided with antimicrobial properties using the silanyl phenols and naphthols according to the invention.
It is also possible for nonwovens, e.g. nappies/diapers, sanitary towels, panty liners, and cloths for hygiene and household uses, to be provided with antimicrobial properties in accordance with the invention.
The silanyl phenols and naphthols of formula (1c) are also used in washing and cleaning formulations, e.g. in liquid and powder detergents or fabric conditioners.
The silanyl phenols and naphthols of formula (1c) can be used especially also in household and all-purpose cleaners for cleaning and disinfecting hard surfaces.
A cleaning preparation has, for example, the following composition:

    0.01 to 5% of the compound of formula (1c)















3.0%
octyl alcohol 4E0


1.3%
fatty alcohol C8–C10polyglucoside


3.0%
isopropanol


ad 100%
water.









In addition to preserving cosmetics and household products, it is also possible for technical products to be preserved and provided with antimicrobial properties; use as a biocide in technical processes is also possible, for example in paper treatment, especially in paper treatment liquors, printing thickeners of starch or cellulose derivatives, varnishes and paints.
The silanyl phenols and naphthols of formula (1c) are also suitable for the antimicrobial treatment of wood and for the antimicrobial treatment of leather, the preservation of leather and the provision of leather with antimicrobial properties.
The compounds according to the invention are also suitable for the protection of cosmetic products and household products from microbial damage.
The following Examples illustrate, but do not limit, the present invention.


PREPARATION EXAMPLES
The preparation of allylphenols in diethylene glycol dimethyl ether is described in general and the preparation of 2-methallyl-4-phenyl-phenol (101d), which is novel, is described in particular:




Example 1
Preparation of 4-biphenyl-methallyl Ether (Compound of Formula 101c)
A mixture of 4.9 g (29 mmol) of 4-hydroxybiphenyl, 3.2 g (35 mmol) of methallyl chloride and 4.8 g (35 mmol) of anhydrous potassium carbonate in 100 ml of absolute DMF is stirred under nitrogen for 12 hours at 85° C. After filtration and removal of the solvent, the ether can be used without further purification for the subsequent rearrangement; yield 6.0 g (92% of theory).
Example 2
Preparation of 2-methallyl-4-phenyl-phenol (Compound of Formula 101d)
2.2 g (10 mmol) of the previously prepared ether are heated at reflux under nitrogen for 48 hours in 20 ml of o-dichlorobenzene at 180° C. The phenol is then separated from the unreacted ether by extracting the reaction mass, which has been diluted with 50 ml of methylene chloride, several times with sodium hydroxide solution at pH 11. After customary aqueous working-up, the product is obtained in sufficient purity for the subsequent hydrosilylation

    (>95 area % GC),
    Yield 1.1 g (50% of theory)
    1H-NMR(CDCl3):
    6.8–7.45 (m,8H,arom.—H), 5.1 (s,1H,OH), 4.8/4.85 (s,1H,═CH), 3.35 (s,2H,CH2), 1.7 (s,3H,CH3)


Examples 3 to 6
Preparation of Further o-allylphenols
General Preparation of o-allylphenols in Diethylene Glycol Dimethyl Ether:
Approximately 25 mmol of the appropriate allyl phenyl ether are stirred in 10 ml of dry diethylene glycol dimethyl ether in a pressurised vessel for 12 hours at 220° C. The mixture is then diluted with approximately 40 ml of petroleum ether and washed twice with water. The isolated crude product is purified by distillation at 10−2 mbar. The expected structures are confirmed by GC/MS and 1H-NMR.















Yield



Compound of

(% of


formula
Structure
theory)
1H-NMR







(II)




50
(CDCl3): 6.8–7.45 (m, 8H, arom.-H), 5.1(s, 1H, OH), 4.8/4.85 (s, 1H, ═CH), 3.35(s, 2H, CH2), 1.7 (s, 3H, CH3)


 


(III)




86
(DMSO-d6): 9.06(s, 1H, OH), 6.76–7.24(m, 3H, arom.-H), 4.72/4.82(s, 1H, ═CH), 3.32(s,2H, PhCH2), 1.77(s, 3H, CH3), 1.32(s, 9H, CCH3)


 


(IV)




78
(DMSO-d6): 9.02(s, 1H, OH), 6.66–6.82(m, 3H, arom.-H), 5.88–5.99(m, 1H, ═CH),4.98/5.02(dd, 2H, ═CH2), 3.24(d, 2H, PhCH2),2.16(s, 3H, CH3)


 


(V)




75
(DMSO-d6): 8.76(s, 1H, OH), 6.52–6.66(m, 3H, arom.-H), 5.82–5.95(m, 1H, ═CH),4.93/4.97(dd, 2H, ═CH2), 3.58(s, 3H, CH3),3.19(d, 2H, PhCH2)









Examples 7 to 27
Hydrosilylation of o-allylphenols
According to the varying r activity of the types of silanes used, the hydrosilylations are carried out according to two similar procedures, which will be described hereinbelow by way of example. Yield and 1H-NMR data are then given in Table form. With the exception of the compound of formula (106), all the compounds are novel.
Examples 7 to 23
Hydrosilylation of o-allylphenols in Toluene
2.9 mmol of the appropriate allylphenol are dissolved under nitrogen in 10 ml of absolute toluene together with a drop of Karstedt catalyst (platinum complex in divinyl-tetramethyl-disiloxane) and heated to 80° C. At that temperature, 3.5 mmol of the appropriate silane are added dropwise and then the mixture is stirred for a further 5 hours at that temperature. After cooling and removal of the solvent, finally under a high vacuum, the residue is purified by flash chromatography over silica gel (eluant: toluene). The products are obtained in the form of pale, viscous oils, and GC/MS and 1H-NMR agree with the expected structures (Table 2):










TABLE 2







Yield (% of



Compound of

theory, based
1H-NMR (CDCl3)


formula
Structure
on phenol)
[ppm]







(101)




45%
6.7–7.25(m, 8H, arom.-H), 4.9(s, 1H, OH),2.55/2.25(dd, 1H, PhCH), 1.85(m, 1H, CH),0.85(d, 3H, CH3), 0.55/0.35(dd, 1H, SiCH),0(s, 18H, SiCH3), −0.1(s, 3H, SiCH3)


 


(102)




72%
6.55–6.8(m, 3H, arom.-H), 5.35(s, 1H, OH),3.8(s, 3H, OCH3), 2.45(t, 2H, PhCH2),1.55(m, 2H, PhCH2CH2), 0.4(t, 2H, SiCH2),0.05(s, 18H, SiCH3), −0.05(s, 3H, SiCH3)


 


(103)




54%
6.85–7.45(m, 8H, arom.-H), 5.0(s, 1H, OH),2.65/2.35(dd, 1H, PhCH), 1.95(m, 1H, CH),0.9(d, 3H, CH3), 0.55/0.4(dd, 1H, SiCH),0.05(s, 18H, SiCH3), 0(s, 3H, SiCH3)


 


(104)




62%
6.65–4.05(m, 4H, arom.-H), 4.15(s, 1H, OH),2.5(t, 2H, PhCH2), 1.55(m, 2H, CH2CH2CH2),0.45(t, 2H, SiCH2), 0(s, 18H, SiCH3),−0.1(s, 3H, SiCH3)


 


(105)




33%
6.65–7.05(m, 4H, arom.-H), 4.65(s, 1H, OH),2.5(t, 2H, PhCH2), 1.6(m, 2H, CH2CH2CH2),0.55(t, 2H, CH2Si), .05(s, 15H, SiCH3),−0.05(s, 6H, SiCH3)


 


(106)




34%
6.7–7.25(m, 4H, arom.-H), .65(s, 1H, OH),2.55(t, 2H, PhCH2), 1.6(m, 2H, CH2CH2CH2),0.55(t, 2H, CH2Si), 0(s, 15H, SiCH3)


 


(107)




52%
6.65–7.5(m, 9H, arom.-H), 4.5(s, 1H, OH),2.5(t, 2H, PhCH2), 1.55(m, 2H, CH2CH2CH2),0.85(t, 2H, CH2Si), 0.2(s, 6H, SiCH3)


 


(108)




61%
1H-NMR(DMSO-d6): 8.81(s, 1H, OH), 6.61–6.93(m, 3H, arom. H), 2.37(d, 2H, PhCH2),1.87(m, 1H, CH), 1.18(s, 9H, C(CH3)3), 0.82(d,3H,CH3), 0.57/0.27(dd, 1H, SiCH),0(s, 18H, SiCH3), −0.07(s, 3H, SiCH3)13C ok


 


(109)




88%
1H-NMR(DMSO-d6): 8.81(s, 1H, OH), 6.56–6.72(m, 3H, arom.-H), 2.4(t, 2H, PhCH2),2.08(s, 3H, CH3), 1.46(m, 2H, CH2CH2),0.40(t, 2H, CH2Si), 0(s, 18H, Si(CH3)3),−0.08(s, 3H, SiCH3)13C ok


 


(110)




51%
1H-NMR(DMSO-d6): 8.62(s, 1H, OH), 6.45–6.65(m, 3H, arom.-H), 3.57(s, 3H, OCH3),2.42(t, 2H, PhCH2), 1.47(m, 2H, CH2CH2),0.40(t, 2H, CH2Si), 0(s, 18h, Si(CH3)3),−0.08(s, 3H, SiCH3)13C ok


 


(111)




42%
1H-NMR(DMSO-d6): 8.44(s, 1H, OH), 6.30–7.30(m, 8H, arom.-H), 3.40(s, 3H, OCH3),2.26(t, 2H, PhCH2), 1.30(m, 2H, CH2CH2),0.53(t, 2H, CH2Si), 0(s, 6H, SiCH3)13C ok


 


(112)




30%
1H-NMR(DMSO-d6): 9.43(s, 1H, OH), 6.68–6.98(m, 3H, arom.-H), 2.46(t, 2H, PhCH2),1.50(m, 2H, CH2CH2), 0.49(t, 2H, CH2Si),0(s, 15H, SiCH3, −0.06(s, 6H, SiCH3)13C ok


 


(113)




42%
1H-NMR(DMSO-d6): 8.81(s, 1H, OH), 6.59–6.92(m, 3H, arom.-H), 2.29/2.44(dd, 1H, PhCH), 1.89(m, 1H, CH3CH),1.16(s, 9H, C(CH3)3), 0.81(d, 3H, CHCH3),0.39/0.62(dd, 1H, CHSi), 0(s, 15H, SiCH3),−0.08(s, 6H, SiCH3)13C ok


 


(114)




53%
1H-NMR(DMSO-d6): 8.83(s, 1H, OH), 6.58–6.76(m, 3H, arom.-H), 2.43(t, 2H, PhCH2),2.10(s, 3H, CH3), 1.48(m, 2H, CH2CH2),0.49(t, 2H, CH2Si), 0(s, 9H, SiCH3), −0.01(s, 6H, SiCH3)13C ok


 


(115)




70%
1H-NMR(DMSO-d6): 9.46(s, 1H, OH), 6.67–7.04(m, 3H, arom.-H), 2.47(t, 2H, PhCH2),1.50(m, 2H, CH2CH2), 0.48(t, 2H, CH2Si),0(s, 9H, SiCH3), −0.01(s, 6H, SiCH3)13C ok


 


(116)




65%
1H-NMR/DMSO-d6): 8.85(s, 1H, OH), 7.1–8.15(m, 6H, arom.-H), 2.75(t, 2H, PhCH2),1.55(m, 2H, CH2CH2), 0.45(t, 2H, CH2Si), 0(s,18H, SiCH3), −0.1(s, 3H, SiCH3)


 


(117)




75%
1H-NMR(DMSO-d6): 8.85(s, 1H, OH), 7.1–8.15(m, 6H, arom.-H), 2.6(d, 2H, PhCH2),1.95(m, 1H, CH), 0.85(d, 3H, CH3), 0.6/0.35(dd, 1H, SiCH), 0(s, 18H, SiCH3), −0.1(s, 3H, SiCH3)









Examples 24 to 27
Hydrosilylation of o-allylphenols in Xylene
2.9 mmol of the appropriate allylphenol are dissolved under nitrogen in 10 ml of absolute xylene together with a drop of Karstedt catalyst (platinum complex in divinyl-tetramethyl-disiloxane) and 3.5 mmol of the appropriate silane. The reaction mixture is maintained at reflux for 48 hours. After cooling and removal of the solvent, finally under a high vacuum, the residue is purified by flash chromatography over silica gel (eluant: xylene). The products are obtained in the form of pale, viscous oils, and GC/MS and 1H-NMR agree with the expected structures (Table 3):










TABLE 3







Yield (% of



Compound of

theory, based
1H-NMR (CDCl3)


formula
Structure
on phenol)
[ppm]







(118)




41%
—


 


(119)




29%
1H-NMR(CDCl3): 6.48–7.34(m, 8H, arom.-H),4.42(s, 1H, OH), 2.39(t, 2H, PhCH2), 1.45(m, 2H, CH2CH2CH2), 0.65(t, 2H, CH2Si), 0.1(s, 6H, SiCH3)13C ok


 


(120)




25%
1H-NMR(DMSO-d6): 8.94(s, 1H, OH), 6.41–7.22(m, 13H, arom.-H). 2.09/2.24(dd, 1H, PhCH), 1.69(m, 1H, CH3CH), 0.56(d, 3H, CH3), 0.40/0.65(dd, 1H, CHSi), 0(s, 6H,SiCH3)13C ok


 


(121)




37%
1H-NMR(DMSO-d6): 8.65(s, 1H, OH), 6.8–7.95(m, 11H, arom.-H), 2.45/2.35(dd, 1H, PhCH), 1.75(m, 1H, CH),0.75/0.45(dd, 1H, CHSi), 0.6(d, 3H, CH3),0(s, 6H, SiCH3)









Example 28
Determination of the Minimum Inhibitory Concentration (MIC) in the Agar Incorporation Test (MIC Test)













Medium:
casein/soybean flour peptone agar (Merck)



*Sabouraud 4% glucose agar (Merck)


Dilution medium:
sterile 0.85% NaCl solution


Test organisms:
Staphylococcus aureus ATCC 9144



Escherichia coli NCTC 8196



Pseudomonas aeruginosa CIP A-22



Candida albicans ATCC 10231



*Aspergillus niger ATCC 6275


Incubation:
24 hours at 37° C.



*3 days at 28° C.


Test solution:
1% stock solutions of all the test substances in a suit-



able solvent are prepared and diluted in serial dilutions



to final concentrations of from 1000 ppm to 10 ppm.









Test Principle:

0.3 ml of each dilution stage is mixed with 15 ml of still-liquid nutrient medium. After the nutrient medium has solidified, 10 μl of each of the following organism dilutions of the test strains in 0.85% NaCl solution are spotted onto the agar medium:

















Staphylococcus aureus ATCC 9144
1:100
dilution



Escherichia coli NCTC 8196
1:1000
dilution



Pseudomonas aeruginosa CIP A-22
1:1000
dilution



Candida albicans ATCC 10231
1:10
dilution



Aspergillus niger ATCC 6275
1:10
dilution










The plates are incubated for 24 hours at 37° C. (A. niger 3 days at 28° C.) and then the highest dilution (lowest concentration) of the test substance at which growth is just no longer discernible (corresponds to the MIC) is determined.
The results are shown in Tables 3a and 3b.







TABLE 3a







MIC values in ppm









Compound of formula











Microorganisms
(101)
(102)
(118)
(104)














Staphylococcus aureus
1000
>1000
4
8


ATCC 9144


Escherichia coli NCTC 8196
>1000
>1000
>1000
>1000


Pseudomonas aeruginosa
>1000
>1000
>1000
>1000


CIP A-22


Candida albicans ATCC 10231
>1000
>1000
>1000
>1000


Aspergillus niger ATCC 6275
>1000
>1000
>1000
>1000
















TABLE 3b







MIC values in ppm









Compound of formula











Microorganisms
(103)
(105)
(107)
(106)














Staphylococcus aureus
>560
15.6
1.9
7.8


ATCC 9144


Staphylococcus hominis
>560
>1000
7.8
31.2


DSM 20328


Corynebacterium xerosis
17.5
3.9
1.9
7.8


ATCC 373


Enterococcus hirae ATCC 10541
>560
15.6
3.9
15.6


Escherichia coli NCTC 8196
>560
>1000
>1000
>1000


Pseudomonas aeruginosa
>560
>1000
>1000
>1000


CIP A-22


Candida albicans ATCC 10231
>560
>1000
125
>1000


Aspergillus niger ATCC 6275
>560
>1000
15.6
31.2
















TABLE 3c







MIC values in ppm









Compound of formula












Microorganisms
(108)
(109)
(110)
(119)
(111)















Staphylococcus aureus
0
15
250
4
125


ATCC 9144


Corynebacterium xerosis
8
4
4
2
8


ATCC 373


Escherichia coli NCTC
>1000
>1000
>1000
>1000
>1000


8196


Pseudomonas aeruginosa
>1000
>1000
>1000
>1000
>1000


CIP A-22


Candida albicans ATCC
>1000
>1000
>1000
62
>1000


10231


Aspergillus niger ATCC
>1000
>1000
>1000
62
>1000


6275
















TABLE 3d







MIC values in ppm









Compound of formula












Microorganisms
(112)
(120)
(113)
(114)
(115)















Staphylococcus aureus
7
8
>1000
8
15


ATCC 9144


Corynebacterium xerosis
2
4
62
8
8


ATCC 373


Escherichia coli NCTC
>1000
>1000
>1000
>1000
250


8196


Pseudomonas aeruginosa
>1000
>1000
>1000
>1000
>1000


CIP A-22


Candida albicans ATCC
>1000
>1000
>1000
>1000
500


10231


Aspergillus niger ATCC
>1000
>1000
>1000
>1000
500


6275
















TABLE 3e







MIC values in ppm









Compound of formula










Microorganisms
(121)
(116)
(117)













Staphylococcus aureus ATCC 9144
>1000
>1000
>1000


Staphylococcus hominis DSM 20328
>1000
>1000
>1000


Corynebacterium xerosis ATCC 373
250
500
1000


Escherichia coli ATCC 10536
>1000
>1000
>1000


Candida albicans ATCC 1023
>1000
>1000
>1000


Aspergillus niger ATCC 6275
>1000
>1000
>1000









The results show a strong antimicrobial activity of the test substances against Gram-positive and Gram-negative bacteria and against fungi and yeasts.

## Claims

1. A process for the preparation of a compound of formula




wherein a phenol or naphthol compound is etherified with an allyl halide (1st step), the resulting alkenyl phenyl ether compound is rearranged to form an alkenylphenyl compound (2nd step), and a silane compound that contains at least one Si—H bond is added to that compound according to the following Scheme:




wherein
R1 is hydrogen; halogen; hydroxy; C1–C20alkyl; C3–C12cycloalkyl; C1–C20alkoxy; trifluoromethyl; pentafluoroethyl; mono- or di-C1–C5alkylamino; hydroxy-C1–C5alkyl; or phenyl, phenyl-C1–C20alkyl, phenoxy, phenyl-C1–C20alkoxy, naphthyl or naphthyl-C1–C20alkyl each unsubstituted or substituted by C1–C5alkyl, C3–C12cycloalkyl, C1–C5alkoxy, C3–C12cycloalkoxy, halogen, oxo, carboxy, carboxy-C1–C7alkyl ester, carboxy-C3–C12cycloalkyl ester, cyano, trifluoromethyl, pentafluoroethyl, amino N,N-mono- or di-C1–C20alkylamino or by nitro;
R2, R3 and R4 are each independently of the others hydrogen; C1–C20alkyl; or C3–C12-cycloalkyl;
R5, R6 and R7 are each independently of the others C1–C20alkyl; C5–C10aryl; C1–C20alkoxy; phenyl-C1–C20alkyl; phenyl-C1–C20alkoxy, C2–C5alkenyl; —O—Si—(C1–C5alkyl)3; or —O—Si—(C1–C5alkyl)2-O—Si(C1–C5alkyl)3 and
n is 0 or 1,

there not being included compounds of formula (1a) wherein
R1, R2, R3 and R4 are hydrogen and R5, R6 and R7 are simultaneously methyl or ethyl.

2. A method for the antimicrobial treatment of a surface, which comprises contacting said surface with an antimicrobially effective amount of a silanyl phenol or naphthol compound of formula




wherein
R1 is hydrogen; halogen; hydroxy; C1–C20alkyl; C3–C12cycloalkyl; C1–C20alkoxy; trifluoromethyl; pentafluoroethyl; mono- or di-C1–C5alkylamino; hydroxy-C1–C5alkyl; or phenyl, phenyl-C1–C20alkyl, phenoxy, phenyl-C1–C20alkoxy, naphthyl or naphthyl-C1–C20alkyl each unsubstituted or substituted by C1–C5alkyl, C3–C12cycloalkyl, C1–C5alkoxy, C3–C12cycloalkoxy, halogen, oxo, carboxy, carboxy-C1–C7alkyl ester, carboxy-C3–C12cycloalkyl ester, cyano, trifluoromethyl, pentafluoroethyl, amino, N,N-mono- or di-C1–C20alkylamino or by nitro;
R2, R3 and R4 are each independently of the others hydrogen; C1–C20alkyl; or C3–C12-cycloalkyl;
R5, R6 and R7 are each independently of the others C1–C20alkyl; C5–C10aryl; C1–C20alkoxy; phenyl-C1–C20alkyl; phenyl-C1–C20alkoxy; C2–C5alkenyl; —O—Si—(C1–C5alkyl)3; or —O—Si—(C1–C5alkyl)2-O—Si(C1–C5alkyl)3; and
n is 0 or 1.

3. A method according to claim 2, wherein the compound of formula (1c) is used in the antimicrobial treatment, deodorisation and disinfection of the skin, mucosa and hair.

4. A method according to claim 2, wherein the compound of formula (1c) is used in the treatment of textile fibre materials.

5. A method according to claim 2, wherein the compound of formula (1c) is used in preservation.

6. A method according to claim 2, wherein the compound of formula (1c) is used in washing and cleaning formulations.

7. A method according to claim 2, wherein the compound of formula (1c) is used in imparting antimicrobial properties to and preserving plastics, paper, nonwoyens, wood or leather.

8. A method according to claim 2, wherein the compound of formula (1c) is used in imparting antimicrobial properties to and preserving technical products.

9. A method according to claim 2, wherein the compound of formula (1c) is used as a biocide in technical processes.

10. A personal care preparation, comprising from 0.01 to 15% by weight, based on the total weight of the composition, of the compound of formula (1c) defined according to claim 2, and cosmetically tolerable adjuvants.

11. An oral composition, comprising from 0.01 to 15% by weight, based on the total weight of the composition, of the compound of formula (1c) defined according to claim 2, and orally tolerable adjuvants.