A novel approach for the synthesis of functionalized 1,5-benzodiazepine is described. The protocol is triggered by a tandemconjugatedaddition/cyclizationprocess from the readily available starting materials 1,2-phenylenediamine and ethyl propiolate. The products have secondary amino and ester groups, and a β-enamino ester, which can serve in further functionalizations to produce molecular diversity
In(OTf)3-Catalyzed Synthesis of Functionalized 1,5-Benzodiazepines from o-Phenylenediamine and Alkyl Propiolates under Solvent-Free Reaction Conditions
作者:Haisheng Wu、Jin Yang、Lei Wang
DOI:10.1002/cjoc.201180307
日期:2011.8
environmental‐friendly, and practical method for the synthesis of benzodiazepine derivatives through a reaction of substituted o‐phenylenediamines with alkylpropiolates has been developed. The reactions generated the 1,5‐benzodiazepines in good to excellent yields in the presence of catalytic amount of In(OTf)3 under solvent‐free reactionconditions.
apicoplast in the survival of the parasite. In this study, we present the rational design strategy employing sustainable catalysis for the synthesis of benzodiazepine (BDZ) conformers followed by their biological evaluation as prospective inhibitors against the potential target of the IPP pathway, 1-deoxy-D-xylulose-5-phosphatereductoisomerase (DXR). The study reported the inhibitory profile of 8c and 6d
Gallium(III) triflate-catalyzed [4+2+1] cycloaddition of o-phenylenediamines and 2 equiv of alkynoate under solvent-free and ultrasonic irradiation conditions afforded novel 3,4-disubstituted-1,5-benzodiazepines in 82-90% yields. (C) 2009 Elsevier Ltd. All rights reserved.