bluuebunny/crossref_metadata_2025_split huggingface dataset:
Über den sterischen Bau der pentacyclischen Chromkomplexe aus 1, 2‐Di‐(2‐amino‐benzolsulfonamido)‐äthan bzw. 1,3‐Di‐(2‐amino‐benzolsulfonamido)‐propan → β‐Naphtol
Authors: Schetty G. 
Published: December 2004

AbstractPentacyclic chromium complexes are produced from the bisazo dyestuffs 1,2‐(resp. 3)‐(2‐amino‐benzenesulfonamido)‐ethane (resp. propane) → β‐naphtol. It is concluded from their absorption spectra that their steric arrangement corresponds to a «1:2‐sandwich complex» linked internally, preference being given to one of the possible coordination arrangements. Because of the great similarity of their spectra to that of a previously described «1:2‐chromium‐sandwich complex» from anthranilic acid → β‐naphthol, it is concluded that they are arranged in the same way as the latter.
Odeur et constitution XXIII. Le méthyl‐2‐isopropényl‐5‐anisole, constituant de l'huile essentielle de «Hinoki» de Formose
Authors: Thomas Alan F. 
Published: December 2004

AbstractA new substance, isolated from “Hinoki” oil, has been identified by synthesis as 2‐methyl‐5‐isopropenyl‐anisole. Lead tetraacetate oxidation of carvacryl methyl ether leads to attack on the methyl group ortho to the ether function rather than on the isopropyl group.
Untersuchung reversibler Photoprozesse durch Blitzlichtphotolyse I. Eine Blitzlichtapparatur mit Zündfunkenstrecke
Authors: Wild U. , Günthard Hs. H. 
Published: December 2004

AbstractA flash photolysis apparatus is described. The photoflash discharge tube forms the inner conductor of a quasi‐coaxial line connected by a triggered spark gap to the storage capacitor. Some operating characteristics of the spark gap are given. The range of flash energy is 50–1500 J at pulse durations of less than 10 μs in the visible region. A capillary discharge is used for spectroflash with 150 J max. energy, triggered by a similar spark gap. Combined with a continuous light source, several types of experiments may be carried out: flash photolysis, kinetic spectrophotometry with observation of transient absorption, and emission spectra. The sample area is sufficiently flexible to allow the use of a wide variety of cells, permitting studies over a wide range of temperature.
Recherches expérimentales sur l'ozonation des fumarate, maléate et cinnamate d'éthyle, suivie par spectrographie d'absorption IR. II. Confrontation de la scission spontanée des ozonides des fumarate et maléate d'éthyle avec celle de l'ozonide de cinnamate d'éthyle
Authors: Briner E. , Rossetti G.‐P. , Fliszàr S. 
Published: December 2004

AbstractLa scission spontanée des ozonides de maléate et de fumarate d'éthyle en solution dans CCl4 conduit aux glyoxylate et oxalate acide d'éthyle (ce dernier se transformant en oxalate diéthylique et en acide oxalique).
Über die Herkunft der C‐Atome 2 und 8 der Harnsäure bei Drosophila melanogaster
Authors: Brenner‐Holzach O. , Leuthardt F. 
Published: December 2004

AbstractUric acid has been isolated from adult Drosophila melanogaster fed with glucose‐[1‐14C] and glucose ‐[6‐14C]. The specific activities of carbon 2 and 8 of the purine skeleton were considerably higher after feeding glucose‐[6‐14C] than after glucose‐[1‐14C]. The same experiments with serine‐[1‐14C] and serine‐[3‐14C] have shown that the C‐3 of serine leads to high activities of C‐2 and C‐8 of the purine ring.
Löslichkeitsprodukte von Metalloxiden und ‐hydroxiden. 10. Mitteilung. Löslichkeitsprodukte von Zinkoxid, Kupferhydroxid und Kupferoxid in Abhängigkeit von Teilchengrösse und molarer Oberfläche. Ein Beitrag zur Thermodynamik von Grenzflächen fest‐flüssig
Authors: Schindler P. , Althaus H. , Hofer F. , Minder W. 
Published: December 2004

AbstractThe effect of particle size and molar surface on the solubilities of ZnO, Cu(OH)2 and CuO has been determined at 25° in solutions of a constant ionic strength (0,2) consisting primarily of sodium perchlorate. From the experimental data, the following values for the free enthalpy of the solid‐liquid interface were calculated:

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Über den Druckverlust strömender Gase in Schüttschichten bei erhöhtem Druck
Authors: Böhlen B. , Bürki H. U. , Guyer A. 
Published: December 2004

AbstractEs wurden Untersuchungen über den Druckverlust strömender Gase in Schüttschichten bei Absolutdrucken von 1–21 ata durchgeführt. Die Untersuchungen führten zur Bestimmung von Reibungs‐ und Form‐Oberflächen‐Faktoren für geometrisch definierte und undefinierte Partikel mit poröser und unporöser Kornstruktur.
Die Kristallstruktur von 1,4‐trans‐Diaminocyclohexan‐dihydrochlorid
Authors: Dunitz J. D. , Strickler P. 
Published: December 2004

AbstractCrystals of 1,4‐trans‐diaminocyclohexane dihydrochloride are monoclinic, a = 6.36, b = 5.27, c = 14.91 Å, γ = 100°, space group P21/n (first setting), Z = 2. The structure has been determined by three‐dimensional analysis based on counter data. The mean CCC‐angle in the cyclohexane ring is 110,7°.
FRIEDEL‐CRAFTS‐Reaktionen mit aromatischen äthern. 2. Mitteilung [1]. Reaktionsverlauf beim Umsatz von Veratrol mit Zimtsäure bzw. Zimtsäure‐methylester in Polyphosphorsäure
Authors: Marquardt F.‐H. 
Published: December 2004

AbstractThe condensation of cinnamic acid and veratrole, yielding 5, 6‐dimethoxy‐1‐indanone, takes place with acylation as the first step (e.g. with 3′, 4′‐dimethoxy‐chalcone as intermediate), followed by alkylation. If the methyl ester of cinnamic acid is employed instead of the acid itself, the order of the steps is reversed (e.g. with methyl β‐(3,4‐dimethoxyphenyl)‐β‐phenyl‐propionate as the main intermediate).
ESR.‐Spektren von CuN4‐Chromophoren: Komplexe des zweiwertigen Kupfers mit Pyridin und Pyridinderivaten
Authors: Schneider W. , Zelewsky A. V. 
Published: December 2004

AbstractThe ESR. spectra of four copper complexes, containing pyridine, 4‐picoline, 4‐dimethylaminopyridine, and 4‐cyanopyridine as ligands, have been measured in the solid state. Single crystals of the corresponding PtII oder CdII compounds were used as host lattices and magnetic diluents. The spectra of the CuN4 chromophores, showing resolved hyperfine structure due to copper and nitrogen nuclear magnetic momenta, could be analysed within a Spin‐Hamiltonian corresponding to effective symmetry D4h. They have been interpreted by means of molecular orbital theory, and the delocalization parameters have been deduced on the assumption of near degeneracy of the excited levels within the widths of the observed visible absorption band. It is shown that the delocalization parameters apparently do not display any influence of the widely different substituents in the 4 position of the ligands. The parameter describing the π‐antibonding character of the excited state, Eg, differs from the expected value. This is probably due to some fundamental deficiency in the MO scheme so far generally applied to chromophores CuO4, CuO2N2 and CuN4.
Inaktivierung der Kaninchen‐muskel‐und‐leberaldolase in 4M Harnstofflösung. Über Aldolasen, 6. Mitteilung
Authors: Christen Ph. , Leuthardt F. , Schmid A. 
Published: December 2004

Abstract(1) Muscle and liver aldolase from rabbit are reversibly inactivated in 4M urea at pH 7,6, without being split into sub‐units. At the same pH value muscle aldolase, but not liver aldolase, dissociates into three sub‐units, if the ionic strength is increased by the addition of NaCl to a final concentration of 0,2M. At pH 5,5 and low ionic strength (in the absence of NaCl) both aldolases dissociate into sub‐units.
Messung der HAMMETT'schen Aciditätsfunktion in Schwefelsäure/Wasser mittels Glaselektroden
Authors: Clerc J. T. , Štefanac Z. , Simon W. 
Published: December 2004

AbstractSuitable glass electrodes can be used to measure the HAMMETT Acidity Function Ho in sulfuric acid/water in the range Ho = −1 to H0 = − 9,6 with a standard deviation of 0.04 H0 unit. It is shown that such glass electrodes respond as a protode in the range H0 = −1 to H0 = −6.
Untersuchungen über die Biosynthese der Pterine bei Drosophila melanogaster 3. Mitteilung: Über die Herkunft der Seitenkette im Drosopterin
Authors: Brenner‐Holzach O. , Leuthardt F. 
Published: December 2004

Abstract(1) Larvae of Drosophila melanogaster (wild type) were fed with differently labelled [14C]‐glucose. Drosopterine and isoxanthopterine were isolated from the extracts of the young flies. After the administration of glucose‐[1‐14C] both pterines had the same specific radioactivity; after glucose‐[U‐14C] and glucose‐[6‐14C] isoxanthopterine had a lower activity than drosopterine (70% and 45% resp. with respect to the latter).
Polarographie an Festelektroden III. Gleichspannungspolarographie von Thallium an einer Silberelektrode vom Kammertyp
Authors: Schmidt E. , Gygax H. R. 
Published: December 2004

AbstractDie Abscheidung von Thallium auf Silberelektroden aus wässeriger Lösung wird analog der Abscheidung von Blei auf Silberelektroden gleichspannungspolarographisch mit Hilfe einer Messelektrode vom Kammertyp untersucht. Die Ausbildung der ungesättigten (submonoatomaren) Deckschicht erfolgt bei genügend langsamem Potentialanstieg polarographisch reversibel, wobei sich die Thalliumaktivität als Bedeckungsisotherme vom Sigmoidtyp darstellen lässt. Die Aktivitätsisotherme des Thalliums ist derjenigen des Bleis vergleichbar. Die Strombilanz des Elektrodenvorganges wird durch coulometrische Auswertung der Polarogramme geprüft.
Die Cardenolide von Parquetina nigrescens (AFZEL) BULLOCK 3. Mitt. Die Konstitution 5 neuer Cardenolide (16‐Dehydrostrophanthidin und verwandte Substanzen). Glykoside und Aglykone, 271. Mitteilung [1]
Authors: Berthold R. , Wehrli W. , Reichstein T. 
Published: December 2004

AbstractThe structures of five new Cardenolides (A1, C, D, E, and K), isolated from Parquetina nigrescens, have been either partially or totally elucidated. Substance A1 is 16β‐acetoxystrophanthidin 1 and substance C is 16‐dehydrostrophanthidin 4. Substance D is a monodigitoxide of 16‐dehydrostrophanthidin whose structure is probably that shown in formula 7. E was found to be a mixture of 16‐dehydrostrophanthidol 8 and the digitoxide of an unidentified genin. Substance K is probably the rhamnoside of 16‐acetoxystrophanthidin, whose structure is probably represented by 2 16‐dehydrostrophanthidol 8 which was used as a reference substance, was obtained by reduction of 16‐dehydrostrophanthidin 4 with NaBH4.
Experimentelle Beiträge zum MILLS‐NIXON‐Effekt II: Arin‐Substitution und magnetische Kernresonanzspektren von isomeren Bromindanen und Bromtetralinen [1] 2. Mitteilung über nucleophile aromatische Substitutionen [2]
Authors: Eigenmann G. , Zollinger Hch. 
Published: December 2004

Abstract1. The reaction of the isomeric bromo‐o‐xylenes, bromoindans and bromotetralins with lithiumpiperidide and piperidine was investigated. The ratios of the isomers of the thus formed piperidinoaromatic compounds as well as the relative reactivities of the o‐H atoms were determined.
Untersuchung reversibler Photoprozesse durch Blitzlichtphotolyse II. Triplett‐Triplett‐Annihilation von Anthracen
Authors: Wild U. , Günthard Hs. H. 
Published: December 2004

AbstractUsing a flash photolysis apparatus, described in a previous paper, the kinetics of triplet decay and delayed fluorescence of anthracene in glycerol solutions in the temperature range of −20°C to + 90°C have been investigated. By statistical analysis of the kinetic curves the triplet decay kinetics in viscous solvents is shown to consist of competing first and second order reactions. The first order contribution originates from a temperature independent first order decay and a pseudo first order quenching process, the latter having an energy of activation less than that of viscous flow. The second order contribution is produced by the triplet‐triplet annihilation process T + T → S* + S, which is diffusion controlled with an energy of activation equal to that of viscous flow, the frequency factor being in good agreement with DEBYE'S formula. The kinetics of delayed fluorescence are discussed in terms of the kinetic equations of PARKER'S scheme for P‐type delayed fluorescence. Experimentally the delayed fluorescence is shown to be consistent with the observed kinetics of the triplet decay using PARKER'S treatment.
Derivate der Betalaminsäure
Authors: Wilcox M. E. , Wyler H. , Dreiding André S. 
Published: December 2004

AbstractBetalamic acid, the structural unit which is characteristic for the watersoluble centrospermae pigments, the betacyanins and the betaxanthins, has been prepared as the semicarbazone of the dimethyl ester by a “base exchange reaction” from betanidin trimethyl ester and semicarbazide. The UV.‐ and NMR.‐spectra support the proposed structure. The semicarbazone has been reconverted to betanidin trimethyl ester by means of cyclodopa methyl ester.
L'aromatisation acido‐catalysée de l'oxime d'une cyclohexadiénone
Authors: Dvolaitzky Maya , Dreiding André S. 
Published: December 2004

Abstractp‐Cyclohexadienone‐oximes show NMR.‐signals for the syn‐α‐proton at about δ = 6,9; the syn‐β‐, the anti‐α‐and the anti‐β‐proton signals, however, appear in the region of δ = 6,0−6,4. This is based on a comparison of the NMR.‐spectra of the oximes of spiro[5 · 5]undeca‐1,4‐diene‐3‐one and 4‐bromo‐spiro[5 · 5]undeca‐1,4‐diene‐3‐one and on IR.‐spectroscopic data and steric considerations. These chemical shifts differ characteristically from those of the corresponding vinyl hydrogens of the parent p‐cyclohexadienones; the difference must be attributed on the one hand to the effect of the syn‐hydroxyl group and on the other to the nitrogen. On this basis it is possible to assign syn‐ and anti‐configurations respectively to the oximes of steroidal A‐ring dienones and even to determine quantitatively the composition of mixtures of the syn‐anti isomers, which are usually difficult to separate.
IR.‐spektroskopische Untersuchungen in der Imidazol‐Reihe
Authors: Manukian B. K. 
Published: December 2004

AbstractEs wurden einige «Benzoylen»‐, «Naphtoylen»‐ und «Diphenoylen»‐imidazole bzw.‐perimidine hergestellt und IR.‐spektroskopisch mit einer Anzahl ähnlich gebauter neuer Farbstoffe verglichen.
Zur Kenntnis der Hexaalkylbenzole. 9. Mitteilung;. Zur Cyclisierung polyalkylierter o‐Benzoylbenzoesäuren
Authors: Hopff H. , Gati A. 
Published: December 2004

AbstractThe cyclisation of o‐(penta‐n‐propyl‐benzoyl)‐benzoylchloride by anhydrous aluminium chloride produced the mixture of the lactone of 5, 6, 7, 8‐tetra‐n‐propyl‐9‐hydroxy‐9, 10‐dihydro‐10‐ethyl‐anthracene‐1‐carboxylic acid, and of 5, 6, 7, 8‐tetra‐n‐propyl‐9,10‐dihydro‐10‐ethyl‐anthracene‐1‐carboxylic acid.
Migration électrolytique d'ions argent radioactifs dans des macrocristaux de bromure d'argent
Authors: Steiger R. , Boustany K. , Boissonnas Ch. G. 
Published: December 2004

AbstractA cylindrical disk of macrocrystalline silver bromide marked on one side with radioactive silver ions (110mAg) has been used as a diaphragm for electrolysis between two cells filled with water in which two platinum electrodes were immersed.
Fluoreszenzmethoden zur histochemischen Sichtbarmachung von Monoaminen. 6. Identifizierung der fluoreszierenden Produkte aus m‐Hydroxyphenyläthylaminen und Formaldehyd
Authors: Corrodi H. , Jonsson G. 
Published: December 2004

AbstractIt is known that in tissue slices treated with dry gaseous formaldehyde according to the histochemical technique of HILLARP & FALCK structures containing catecholamines show a green fluorescence in the fluorescence microscope. The m‐hydroxyphenylethylamines m‐tyramine, m‐hydroxyamphetamine and m‐hydroxynorephedrine (metaraminol) enclosed in vitro in dry protein films undergo a similar reaction with dry gaseous formaldehyde and form fluorescent products which have been characterized as 6‐hydroxy‐3,4‐dihydro‐isoquinolines existing predominantly in the quinoidal form fluorescing at 385/510 nm. By treatment of these protein layers with gaseous hydrogen chloride another form fluorescing at 360/420 nm can be obtained which is not visible in the fluorescence microscope with the usual equipment.
Recherches sur la formation et la transformation des esters LXIV. Acides aminoalcoylsulfuriques et isothiocyanates: N‐thiocarbamylation sans ou avec alcoylation cyclisante intramoléculaire
Authors: Cherbuliez Emile , Baehler Br. , Jaccard S. , Jindra H. , Weber G. , Wyss G. , Rabinowitz J. 
Published: December 2004

AbstractAminoalkyl sulfuric monoesters with primary or secondary amino groups – with the exception of colaminesulfuric monoester – react with isothiocyanates in the presence of one equivalent of a base to yield the corresponding hydrosoluble salts of [N‐aryl(aralkyl or alkyl)thiocarbamoyl]‐aminoalkyl sulfates.
Ermittlung der absoluten Konfiguration von Indolinalkaloiden durch Vergleiche der Optischen Rotationsdispersionen ihrer N(a)‐Acylderivate
Authors: Klyne W. , Swan R. J. , Bycroft B. W. , Schmid H. 
Published: December 2004

AbstractA further application of Optical Rotatory Dispersion (ORD) for indole alkaloids containing an N‐acylindoline chromophore has completely substantiated an earlier assignment of the absolute configuration of Aspidosperma alkaloids and has extended the general scope of this method, allowing assignments to the absolute configuration of N(a)‐acetyl‐aspidospermatidine and limatine.
Die Auftrennung der Chlorophylle durch Gegenstromextraktion
Authors: Arn H. , Grob E. C. , Signer R. 
Published: December 2004

AbstractThe chlorophylls a and b from nettle leaves have been separated from each other and from the carotenoids by counter‐current distribution in a new apparatus, which will be described in detail in a subsequent paper. The solvent system used was methanol‐water 95:5 (with addition of 10−3% of oxalic acid to prevent allomerization) and petroleum ether (b.p. 50–70°C).
Zur Kenntnis der sogenannten «Erdalkalicarbonyle»
Authors: Büchner Werner 
Published: December 2004

AbstractThe alkaline earth metals in liquid ammonia react with carbon monoxide to form the so‐called ‘alkaline earth metal carbonyls’. These products which according to older literature are formulated as M(CO)2(M = Ca, Sr, Ba) contain only 65–70% of the expected amount of carbon monoxide. As can be seen from the nitrogen content of the compounds the solvent ammonia participates in the reaction. By hydrolysis leading to a variety of compounds it is demonstrated that the ‘alkaline earth metal carbonyls’ are mixtures of substances such as metal acetylenediolates, metal methoxides, and ammonium carbonate. These mixtures are different from the ‘alkali carbonyls’ as for instance can be seen from the low acetylenediolate content of the ‘alkaline earth metal carbonyls’.
Synthesen in der Polymyxinreihe. 11. Mitteilung. Die Synthese von Circulin A
Authors: Studer R. O. , Lergier W. , Vogler K. 
Published: December 2004

AbstractThe synthesis of the cycloheptapeptide XIII (Figure 2), corresponding to the structure proposed by T. SUZUKI et al. for the antibiotic circulin A, and its crystallization as pentaphosphate are reported. This synthetic compound proved to be identical in all respects with the crystalline natural circulin A pentaphosphate.
Synthèses dans la série des bis‐indéno‐fluorènes I. Le dihydro‐13, 15‐5H‐bis‐indéno[1, 2‐a;1′, 2′‐h]fluorène
Authors: Chardonnens Louis , Gamba Giacomo 
Published: December 2004

AbstractThe synthesis of 13,15‐dihydro‐5H‐diindeno[1,2‐a;1′,2′‐h] fluorene in six steps starting from flourenone 4‐carboxylic acid and 2,4‐dichlorotoluene is described. As an intermediate product the 5, 13, 15‐trioxo‐derivative is obtained.
Ringschlussreaktionen an Pleiocarpa‐Alkaloiden
Authors: Kump Christl , Dugan J. J. , Schmid H. 
Published: December 2004

AbstractAlkaloids with the pleiocarpin skeleton have been found to undergo ring closure on pyrolysis to give heptacyclic compounds with the kopsan (XI) carbon skeleton. Kopsinic acid (V), the main example, gave kopsanone (XIII). The structure XIII for kopsanone has been established by physical and chemical methods, degradation to the methine base XVII and reduction to kopsan (XI). A mechanism to explain these cyclizations is discussed.
Zur Frage der Existenz von «γ‐Sitosterol» Nachweis von Cholesterol als Bestandteil des «γ‐Sitosterols» einer Digitalis‐Art
Authors: Linde Horst , Ergenç Nedime , Meyer Kuno 
Published: December 2004

AbstractMit Hilfe von Gas‐Chromatographie und Massenspektroskopie wird gezeigt, dass das aus Digitalis canariensis L., var. isabellianaNeuerdings Isoplexis isabelliana (WEBB) MASF. benannt [13]
. isolierte «γ‐Sitosterol» [12] aus β‐Sitosterol, Stigmasterol und Cholesterol besteht. Der Name «γ‐Sitosterol» als Bezeichnung eines einheitlichen Sterins ist zu streichen.
Zur Thermodynamisch‐Phänomenologischen Beschreibung der Färbevorgänge II. Kontinuierliches Modellsystem
Authors: McGregor R. , Milicević B. 
Published: December 2004

AbstractOnly under very restrictive conditions can the non‐equilibrium thermodynamic theories of dissipative processes in continuous media be applied to a description of dyeing systems. A primary restriction results from the complex physico‐chemical nature of fibrous polymers. Under certain conditions, the assumption that a textile substrate may be regarded as a water‐swollen, isotropic gel is possible, and circumvents this restriction.
L‐ Tyrosinhydrazid als optisch aktive Base zur Spaltung von DL‐Prolin, DL‐Alanin und DL‐Isoleucin in die optischen Antipoden
Authors: Vogler K. , Lanz P. 
Published: December 2004

AbstractA new procedure for the resolution of DL‐proline, DL‐alanine and DL‐isoleucine into the optical antipodes is outlined. It is based on the separation of diastereoisomeric salts of D‐ or L‐tyrosine hydrazide with Z‐DL‐proline, Z‐DL‐alanine and Z‐DL‐isoleucine, by means of fractional crystallization in suitable solvents such as lower aliphatic alcohols and water. It is shown that the new method gives excellent yields even with half the molar amount of the optically active resolving agent.
Protonenresonanzspektren von Pteridinen V. 2‐Amino‐4‐oxo‐3,4‐dihydropteridine
Authors: Dieffenbacher A. , Mondelli R. , v. Philipsborn W. 
Published: December 2004

AbstractThe proton magnetic resonance spectra of 20 pteridines, i.e. 2‐amino‐4‐oxo‐3,4‐dihydropteridine and 19 derivatives, have been measured at 100 Mc/s and 60 Mc/s in CF3COOH under standardized conditions as the mono‐cations. The chemical shifts of the vinyl‐, methyl‐ and NH2‐protons are tabulated, and some typical spectra are illustrated. The influence of the substrate concentration and of solvent effects upon the NH‐signals have been studied. Protonation always takes place at N(1) or N(3), and an attempt is made to correlate δ(NH2) and pKa values.
Zur Berechnung der Aciditätskonstante von Sorbit aus der Sorbitolysenkinetik von Reaktivfarbstoffen. 4. Mitteilung über reaktionsmechanistische Untersuchungen an Reaktivfarbstoffen
Authors: Rys P. , Zollinger Hch. 
Published: December 2004

AbstractThe first acid dissociation constant of sorbitol is redetermined (PKa = 13.00; 60°).
Über in 6‐Stellung basisch substituierte Morphanthridine. 8. Mitteilung über siebengliedrige Heterocyclen
Authors: Hunziker F. , Künzle F. , Schmutz J. 
Published: December 2004

AbstractMorphanthridines III with a basic substituent in position 6, which show neuroleptic activity, have been synthesised as follows:Chlorination of the lactams I with POCl3 gave the iminochlorides II, which were converted by bases to the amidines III. The 11‐oxo‐morphanthridines VI and VII were synthesised using the same procedure, 2‐(1‐methylpiperazine‐4‐carbonyl)‐2′‐amino‐benzophenone (XI) was obtained directly from the 6‐chloro‐11‐oxo‐morphanthridine (V) or by extended heating of VI with N‐methylpiperazine. Reduction of the 11‐oxo‐compounds VI and VII with NaBH4 gave the 11‐hydroxy‐compounds IX and X. 3‐(2‐aminophenyl)‐phtalide (VIII) resulted from the acid hydrolysis of IX.