Results 121 to 130 of about 728 (151)

ChemInform Abstract: Dihydro‐1,4‐benzodiazepinones and ‐thiones

ChemInform, 1991
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
A. WALSER, R. I. FRYER
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ChemInform Abstract: SYNTHESES OF THE NOVEL FURO(3,4‐B)(1,5)BENZODIAZEPINONE AND PYRROLO(3,4‐B)(1,5)BENZODIAZEPINONE SYSTEMS

Chemischer Informationsdienst, 1985
AbstractAusgehend vom Hydroxyisobuttersäureester (Ia) und dem Aminosäureester (Ib) werden, wie im Formelschema angegeben, die anellierten Diazepin‐Derivate (IX) hergestellt.
K. MATSUO, K. TANAKA
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Concise diastereospecific pyrrolo[1,2-a][1,4]benzodiazepinone synthesis

Tetrahedron, 2007
Abstract A concise synthesis of the novel pyrrolo[1,2-a]benzodiazepine system, by using the metallo carbenoid/spiro-[6,5]-ammonium ylide/Stevens[1,2]-shift with ring-expansion approach, was reported. The overall cascade process resulted stereospecific.
Mauro Mucedda, Daniele Muroni, Antonio Saba, Carlo Manassero   +3 more
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Variable temperature n.m.r. behaviour of 1,5‐benzodiazepinones and 1,5‐benzodiazepinthiones

Organic Magnetic Resonance, 1976
AbstractThe n.m.r. variable temperature behaviour of the 7‐membered ring in 1,3‐dihydro‐2H‐1,5‐benzodiazepin‐2‐one derivatives and in the corresponding 2‐thiones has been investigated. The results indicate that the ring inversion barrier is higher in the thiones and dependent on substituents bonded at N‐1.
R. BENASSI, LAZZERETTI, Paolo, F. TADDEI, D. NARDI, A. TAJANA   +4 more
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First Highly Enantioselective Synthesis of Benzodiazepinones by Catalytic Hydrogenation

Advanced Synthesis & Catalysis, 2010
AbstractThe first catalytic enantioselective synthesis of benzodiazepinones employing an efficient hydrogenation protocol has been developed. The corresponding products are obtained in good yields, with excellent enantioselectivities and broad functional group tolerance.
Magnus Rueping, Estíbaliz Merino, René M. Koenigs   +2 more
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Iridium Catalyzed Asymmetric Hydrogenation of Cyclic Imines of Benzodiazepinones and Benzodiazepines

Organic Letters, 2012
Highly enantioselective Ir-catalyzed hydrogenation of seven-membered cyclic imines of benzodiazepinones and benzodiazepines was achieved with up to 96% ee. This method provides a direct access to synthesize a range of chiral cyclic amines existing in numerous important natural products and clinical drugs.
Kai, Gao, Bo, Wu, Chang-Bin, Yu, Qing-An, Chen, Zhi-Shi, Ye, Yong-Gui, Zhou   +5 more
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Metal-free oxidative ring contraction of benzodiazepinones: an entry to quinoxalinones

Organic & Biomolecular Chemistry, 2017
Herein is reported a practical method for the construction of 3-benzoylquinoxalinones from benzodiazepinones in the presence of DMSO which serves both as a solvent and an oxidant.
Hasan Mtiraoui, Kevin Renault, Morgane Sanselme, Moncef Msaddek, Pierre-Yves Renard, Cyrille Sabot   +5 more
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ChemInform Abstract: SYNTHESIS OF HEXAHYDROBENZODIPYRAZOLEDIONES, HEXAHYDROBENZOBIS(BENZODIAZEPINONE), AND DITHIOPYRIMIDOQUINAZOLINETETRONE

Chemischer Informationsdienst, 1979
AbstractReaktion des Diesters (I) mit den Hydrazinen (II) führt zu den Benzodipyrazolonen (III) und mit den Säurehydraziden (IV) zu den Diestern (V).
F. ABDEL KADER AMER, E.‐S. AFSAH, M. T. EL‐ZIMAITY, M. A. METWALLY   +3 more
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Quinazolines and 1,4‐benzodiazepines LXVIII. 5‐Heterocyclic‐substituted benzodiazepinones

Journal of Heterocyclic Chemistry, 1975
AbstractThe synthesis of a number of new 1,4‐benzodiazepin‐2‐ones containg the 2‐thiazolyl, 5‐isothiazolyl, 1‐rnethyl‐2‐imidazolyl. 1‐methyl‐5‐pyrazolyl, and 3,5‐dimethyl‐4‐isoxazolyl groups in the 5‐position of the benzodiazepine ring are described.
Robert Kalish, E. Broger, George F. Field, T. Anion, Thomas V. Steppe, Leo H. Sternbach   +5 more
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Phosphoryl chloride induced ring contraction of 1,4‐benzodiazepinones to chloromethylquinazolines

Journal of Heterocyclic Chemistry, 1986
AbstractA ring contraction of 1,4‐benzodiazepin‐2‐one to 2‐chloromethylquinazoline in phosphoryl chloride is described. The intermediacy of an aziridinoquinazoline is proposed.
Donald W. Combs, Jeffery B. Press, Dennis Mulvey, Yolanda Gray‐Nunez, Stanley C. Bell   +4 more
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