Three-Component Synthesis of Cryofluorescent 2,4-Disubstituted 3<i>H</i>-1,5-Benzodiazepines - Conformational Control of Emission Properties
作者:Benjamin Willy、Timea Dallos、Frank Rominger、Jan Schönhaber、Thomas J. J. Müller
DOI:10.1002/ejoc.200800619
日期:2008.10
2,4-Disubstituted benzodiazepines are readily synthesized in good yields from acyl chlorides, terminal alkynes, and benzene-1,2-diamines by a consecutive one-pot, three-component Sonogashira coupling/Michael addition/cyclocondensation sequence. These diazepines display intense solid-state fluorescence, but only weak emission in solution at room temperature. The absorption and emission maxima can be