1,3-DIPHENYLTHIAZOLO[3,4-<i>a</i>]BENZIMIDAZOLE, A NEW RING-FUSED TETRAVALENT SULFUR THIAZOLE SYSTEM
作者:Otohiko Tsuge、Hidehiko Shiraishi、Toshiaki Takata
DOI:10.1246/cl.1980.1369
日期:1980.11.5
1,3-Diphenylthiazolo[3,4-a]benzimidazole, a new 10π-electron heterocycle containing tetravalent sulfur, was prepared by the reaction of 1,2-dibenzoylbenzimidazole with phosphorus pentasulfide in refluxing toluene. Its cycloadditions with alkenes and alkynes occurred across the thiocarbonyl ylide dipole in highly stereoselective and/or regiospecific fashions.
1,2-二苯甲酰基苯并咪唑与五硫化二磷在甲苯中回流反应,制备了1,3-二苯基噻唑并[3,4-a]苯并咪唑,一种新的含四价硫的10π-电子杂环。它与烯烃和炔烃的环加成以高度立体选择性和/或区域特异性的方式发生在硫代羰基叶立德偶极子上。