Investigation of Various Organocatalysts for Improved and Efficient One Pot Synthesis of 2,3-Dihydro-1H-1,5-benzodiazepines Under Solvent-Free Condition
Indium(III) Bromide: A Novel and Efficient Reagent for the Rapid Synthesis of 1,5-Benzodiazepines under Solvent-Free Conditions
作者:J. S. Yadav、B. V. Reddy、S. Praveenkumar、K. Nagaiah
DOI:10.1055/s-2004-834939
日期:——
o-Phenylenediamines (OPDA) undergo rapid condensation with ketones having hydrogens at the α-position in the presence of 10 mol% indium(III) bromide under extremely mild reaction conditions to afford the corresponding 1,5-benzodiazepines in excellent yields with high selectivity. The remarkable features of this new procedure are high conversions, short reaction times, cleaner reaction profiles, high
Borax/phosphorous oxychloride (BPO) efficiently catalyzes the preparation of 1,5‐benzodiazepine derivatives of o‐phenylenediamines and ketones in solvent‐free and solutionconditions. The reaction proceeds efficientlyunder ambient conditions giving excellent yields of the products. This new protocol allows the recycling of catalyst with no loss in its potency.
Highly Efficient Zinc Oxide Nanoparticles Catalyzed Green Synthesis of 1,5-Benzodiazepines under Solvent-Free Path
作者:Yuhao Zhao、Xuejie Yu、Manpreet Saini、Yanxu Ma、Rajesh K. Singh
DOI:10.14233/ajchem.2014.18319
日期:——
An efficient and simple environment-friendly method for the preparation of substituted 1,5-benzodiazepines as biologically interesting compounds under heterogenous catalyst is described. The one-pot multicomponent condensation of o-phenylene-diamine and substituted ketones catalyzed by zinc oxide nanoparticles (ZnO NPs) under microwave under solvent-free condition has been developed. The present protocol provides a green and improved pathway for the synthesis of 1,5-benzodiazepines in terms of excellent yields, short reaction times and reusability of catalyst.
Ferrocene anchored activated carbon as a versatile catalyst for the synthesis of 1,5-benzodiazepines <i>via</i> one-pot environmentally benign conditions
作者:Suman Kusuma、Komal N. Patil、Puneethkumar M. Srinivasappa、Nitin Chaudhari、Ajay Soni、Walid Nabgan、Arvind H. Jadhav
DOI:10.1039/d2ra00202g
日期:——
1,5-Benzodiazepine is considered as one of the central moieties in the core unit of most drug molecules.
1,5-苯二氮卓被认为是大多数药物分子核心单元的中心部分之一。
Room temperature ionic liquid promoted synthesis of 1,5-benzodiazepine derivatives under ambient conditions
The reaction of o-phenylenediamines with both acyclic and cyclic ketones in the ionic liquid 1,3-di-n-butylimidazolium bromide afforded 1,5-benzodiazepines in excellent isolated yields in the absence of a catalyst at ambient temperature. (C) 2003 Elsevier Science Ltd. All rights reserved.