Reaction of Ketone Hydrazones with Diselenium Dihalides: Simple Synthesis of Δ<sup>3</sup>-1,3,4-Selenadiazolines and 2,5-Diarylselenophenes
作者:Kentaro Okuma、Toshiharu Izaki、Kento Kubo、Kosei Shioji、Yoshinobu Yokomori
DOI:10.1246/bcsj.78.1121
日期:2005.6
by one-pot reactions of ketone hydrazones with diselenium dibromide, which suggested the in situ formation of selone and diazoalkane intermediates. The thermolysis of these compounds gave symmetrical olefins, whereas oxidation afforded the corresponding azines. The reaction of acetophenone hydrazones with diselenium dibromide afforded 2,5-diarylselenophenes in moderate yields. The reaction proceeded
通过酮腙与二溴化二硒的一锅反应分离了空间拥挤的顺式和反式-Δ 3 -1,3,4-硒二唑啉,这表明selone和重氮烷中间体的原位形成。这些化合物的热解得到对称烯烃,而氧化得到相应的吖嗪。苯乙酮腙与二溴化二硒反应以中等产率得到2,5-二芳基硒吩。反应通过单独的中间体进行。