Patent GB-1171935-A (GB)
Title: Benzenesulphonyl-Ureas and Process for their Manufacture
IPC: A61K31/64
Filed: 1966-12-01
Abstract: 1,171,935. Benzenesulphonyl ureas. FARBWERKE HOECHST A.G. 1 Dec., 1966 [2 Dec., 1965], No. 53773/66. Heading C2C. The invention comprises compounds of formula wherein R is H, C 1-4  alkyl or phenyl-C 1-4 . alkyl; R<SP>1</SP> is a C 2-8  alkyl, alkenyl or mercaptoalkyl group, a C 4-8  alkoxyalkyl, alkylmercaptoalkyl or alkylsulphinylalkyl group containing at least 2 carbon atoms in the alkylene part, phenyl - C 1-4  - alkyl, phenylcyclopropyl, cyclohexyl - C 1-4  - alkyl, cycloheptylmethyl, cycloheptylethyl, cyclooctylmethyl, an endoalkylenecyclohexyl, -cyclohexenyl, -cyclohexylmethyl or cyclohexenylmethyl group containing 1 or 2 carbon atoms in the endoalkylene part, (C 1-4  alkyl)-cyclohexyl, (C 1-4  alkoxy)-cyclohexyl, C 5-8  cycloalkyl, cyclohexenyl, cyclohexenylmethyl, or a C 4-5 O or C 4-5 S heterocyclic ring optionally containing 1 or 2 ethylenic double bonds and connected to the nitrogen atom either directly or via a CH 2  group: Y is a C 1-4  hydrocarbon chain; Z is C 5-6  aliphatic hydrocarbyl, or a phenyl group optionally substituted by a member selected from C 1-4  alkyl, C 1-4  alkoxy, CF 3 , Cl, Br and F; X is H (provided that Z is optionally substituted phenyl), halogen, C 1-4  alkyl, C 1-4  alkoxy, CF 3  or NO 2 ; and wherein the "phenylene " group is optionally substituted by one or more members selected from C 1-4  alkyl, C 1-4  alkoxy and halogen; and the physiologically tolerable salts of such compounds. These compounds are prepared by (a) reacting R<SP>1</SP>NH 2  or a salt thereof with an appropriately substituted benzenesulphonyl-carbamic acid ester, - thiolcarbamic acid ester, -isocyanate, -urea, - semicarbazide, or -semicarbazone; or (b) reacting an R<SP>1</SP>-substituted isocyanate, carbamic acid ester, thiolcarbamic acid ester, carbamic acid halide or urea with an appropriately substituted benzenesulphonamide; or (c) hydrolysing a correspondingly substituted benzenesulphonyl-isourea ether, -isourea ester, -isothiourea ether, -parabanic acid or -haloformic acid amidine; or (d) hydration of a correspondingly substituted benzenesulphonyl-carbodiimide; or (e) replacing S by O in a correspondingly substituted benzenesulphonyl-thiourea; or (f) by acylating a compound of formula RNH.Y.phenylene.SO 2 .NH.CO.NH.R<SP>1</SP>. Variations of the above methods are also referred to. 4 - [#, - (2 - Phenoxy - benzamido) - ethyl]- benzene-sulphonamide is prepared by reacting 2- phenoxy-benzoyl chloride with 4-(#-aminoethyl)-benzenesulphonamide.  N - {4 - [# - (2 - Phenoxy - benzamido) - ethyl]- benzenesulphonyl } - N<SP>1</SP> - cyclohexyl - thiourea is prepared by reacting 4-[#-(2-phenoxy-benzamido) - ethyl] - benzenesulphonamide with cyclohexyl isothiocyanate, and is convertible with mercuric oxide, methanol and K 2 CO 3  into the corresponding isourea methyl ether. N - {4 - [# - (2 - phenoxy - benzamido) - ethyl]- benzenesulphonyl} - urea is prepared by reacting 4 - [# - (2 - phenoxy - benzamido) - ethyl]- benzenesulphonamide with potassium cyanate. N - {4 - [γ - (2 - chloro - 5 - nitro - benzamido)- propyl] - benzenesulphonyl} - N<SP>1</SP> - cyclohexylurea is prepared by reacting 2-chloro-5-nitrobenzoyl chloride with N-[4-(γ-amino-propyl)- benzenesulphonyl} - N<SP>1</SP> - cyclohexyl - urea, the last-named compound being in turn prepared by hydrolysis of the corresponding γ-acetamidopropyl compound. N - {4 - [# - (2 - phenoxy - benzamido)- ethyl] - benzenesulphonyl} - N<SP>1</SP> - (2,5 - endomethylene - cyclohexyl - methyl) - thiourea is prepared by reacting 4 - [# - (2 - phenoxybenzamido) - ethyl] - benzenesulphonamide with 2,5 - endomethylene - cyclohexyl - methyl isothiocyanate. N - {4 - [# - (2 - phenoxy - benzamido) - ethyl]- benzenesulphonyl} - N<SP>1</SP> - cyclohexyl - isothiourea methyl ether is prepared from the corresponding thiourea by reaction with methyl iodide. The benzenesulphonyl-ureas of the invention and their physiologically tolerable salts are stated to possess hypoglemic action and may be made up with carriers into pharmaceutical compositions suitable for oral administration. The salts may be alkali metal or alkaline earth metal salts.