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Synfacts 2008(12): 1260-1260
DOI: 10.1055/s-0028-1087328
DOI: 10.1055/s-0028-1087328
Synthesis of Heterocycles
© Georg Thieme Verlag
Stuttgart ˙ New York
Three-Component Synthesis of 1,5-Benzo-
diazepines
B. Willy, T. Dallos, F. Rominger, J. Schönhaber, T. J. J. Müller*
Heinrich-Heine-Universität Düsseldorf, Ruprecht-Karls-Universität Heidelberg, Germany and Babes-Bolyai University Cluj-Napoca, Romania
Further Information
Publication History
Publication Date:
20 November 2008 (online)

Significance
Reported is the one-pot synthesis of substituted benzodiazepines from acyl chlorides, alkynes and ortho-aminoanilines. Sonogashira-type cross-coupling leads to the formation of the intermediate alkynone, which then undergoes reaction with the aminoaniline to give the diazepine. Conventional oil-bath heating appeared to give better yields than microwave conditions, but the former required longer reaction times. The availability of substituted phenylenediamines is, of course, crucial to the achievable substitution patterns of the product benzodiazepines.