RuCl<sub>3</sub>·<i>x</i>H<sub>2</sub>O: A Novel and Efficient Catalyst for the Facile Synthesis of 1,5-Benzodiazepines Under Solvent-Free Conditions
作者:Suresh、Anil Saini、Jagir S. Sandhu
DOI:10.1080/00397910802109273
日期:2008.8.29
Abstract 1,5-Benzodizepines are synthesized in excellent yields via condensation of o-phenylenediamine with ketones having a hydrogen at the α-position. The reaction is performed in solvent-freeconditions and 5 mol% of RuCl3·xH2O is enough to direct the reaction to completion.
An Organocatalyzed and Ultrasound Accelerated Expeditious Synthetic Route to 1,5-Benzodiazepines under Solvent-Free Conditions
作者:Pravin V. Shinde、Bapurao B. Shingate、Murlidhar S. Shingare
DOI:10.5012/bkcs.2011.32.4.1179
日期:2011.4.20
In the present work, successful implementation of ultrasound irradiations for the rapid synthesis of 1,5benzodiazepine derivatives under solvent-free conditions is demonstrated. Use of a novel catalyst i.e. camphor sulphonic acid in combination with ultrasound technique is reported for the first time. Comparative study for the synthesis of 1,5-benzodiazepines using conventional as well as ultrasonication
Mild and Efficient Procedure for the Synthesis of 1,5‐Benzodiazepines Catalyzed by Magnesium Perchlorate
作者:Zhan‐Hui Zhang、Shu‐Tao Yang、Jin Lin
DOI:10.1080/00397910600616180
日期:2006.7
Abstract A convenient and efficient method for the synthesis of 1,5‐benzodiazepines by the reaction of o‐phenylenediamines (OPDA) and ketones with hydrogens at the α‐position has been developed. The reaction is carried out at room in the presence of a catalytic amount of magnesium perchlorate under solvent‐free conditions.
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
Ag<sub>3</sub>PW<sub>12</sub>O<sub>40</sub>: A Novel and Recyclable Heteropoly Acid for the Synthesis of 1,5-Benzodiazepines under Solvent-Free Conditions
作者:J. S. Yadav、B. V. Reddy、S. Praveenkumar、K. Nagaiah、N. Lingaiah、P. S. Saiprasad
DOI:10.1055/s-2004-816013
日期:——
o-Phenylenediamines undergo smooth condensation with ketones having hydrogens at α-position on the surface of heteropoly acid (Ag3PW12O40) under extremely mild conditions to afford the corresponding 1,5-benzodiazepines in excellent yields with high selectivity. The catalyst can be recovered by simple filteration and can be reused in subsequent reactions.