Ultrasound enhanced synthesis of 1,5-benzodiazepinic heterocyclic rings
作者:Karla P. Guzen、Rodrigo Cella、Hélio A. Stefani
DOI:10.1016/j.tetlet.2006.09.043
日期:2006.11
1,5-Benzodiazepines are synthesized by a reaction of o-phenylenediamines with a diketone or ketones series by ultrasound irradiation in presence of APTS. The condensation occurred in a mild condition with good to excellent yields. (c) 2006 Elsevier Ltd. All rights reserved.
Asymmetric Hydrogenation of 2,4-Disubstituted 1,5-Benzodiazepines Using Cationic Ruthenium Diamine Catalysts: An Unusual Achiral Counteranion Induced Reversal of Enantioselectivity
作者:Zi-Yuan Ding、Fei Chen、Jie Qin、Yan-Mei He、Qing-Hua Fan
DOI:10.1002/anie.201200309
日期:2012.6.4
highly enantioselectivehydrogenation of 2,4‐disubstituted 1,5‐benzodiazepines using chiral cationicrutheniumdiaminecatalysts (R,R)‐1 has been developed (see scheme; BArF=tetrakis(3,5‐bistrifluoromethylphenyl)borate). Either enantiomer of 2,4‐diaryl‐2,3,4,5‐tetrahydro‐1H‐benzodiazepine derivatives could be obtained by using the same enantiomer of ligand but in the presence of a different achiral counteranion