作者:Kentaro Okuma、Yukiko Tanabe、Ryoichi Itoyama、Noriyoshi Nagahora、Kosei Shioji
DOI:10.1246/cl.130580
日期:2013.10.5
Novel one-pot synthesis of 2,3-benzodiazepines from aryne precursors was accomplished. Tofisopam, well-known anxiolytics, could be synthesized via C–C bond insertion of 4,5-dimethoxybenzyne with 2-ethyl-1-(3,4-dimethoxyphenyl)butane-1,3-dione, followed by the reaction with hydrazine hydrate in a one-pot operation. This protocol is applicable to the synthesis of other biologically active 2,3-benzodiazepines, such as Girisopam and Nerisopam.
成功实现了一锅合成2,3-苯二氮杂烯的小说方法。著名的抗焦虑药托非索潘可以通过4,5-二甲氧基苯乙炔与2-乙基-1-(3,4-二甲氧基苯基)丁烷-1,3-二酮的C–C键插入反应,随后在一锅反应中与水合肼反应来合成。该方法适用于其他生物活性2,3-苯二氮杂烯的合成,如吉利索潘和尼利索潘。