NOVEL REACTIONS OF BENZOTHIAZOLIUM<i>N</i>-PHENACYLIDE WITH METHYLENECYCLOPROPENES
作者:Otohiko Tsuge、Hiroshi Shimoharada、Michihiko Noguchi
DOI:10.1246/cl.1981.1199
日期:1981.9.5
Benzothiazolium N-phenacylide reacted with methylenecyclopropenes having an acyl group on the 4-position to give 3a,11a-dihydro-5aH-furo[3′,2′:2,3]pyrido[6,1-b]benzothiazole derivative via an intermediary 3-butadienylbenzothiazolium betaine. The reaction of the ylide with a methylenecyclopropene bearing two cyano groups on the 4-position in THF gave a cyclobutane together with benzothiazole, whereas
苯并噻唑鎓 N-苯甲酰化物与在 4-位具有酰基的
亚甲基环丙烯反应得到 3a,11a-二氢-5aH-
呋喃[3',2':2,3]
吡啶并[6,1-b]
苯并噻唑衍
生物中间体 3-
丁二烯基
苯并噻唑甜菜碱。叶立德与在 THF 中的 4-位带有两个
氰基的
亚甲基环丙烯反应得到
环丁烷和
苯并噻唑,而在
乙醇中的反应中得到 3-
丁二烯基-2-乙氧基
苯并噻唑啉衍
生物。