Synthetic photochemistry. Elaboration of the tricyclo[6.3.0.0]-undecane (‘hirsutane’) carbon skeleton by intramolecular photocyclisations of dicyclopent-1-enylmethanes
作者:Joseph S. H. Kueh、Michael Mellor、Gerald Pattenden
DOI:10.1039/p19810001052
日期:——
addition of methanol to the presumed intermediate bicyclo[2.1.0]pentane (11), producing the cis,syn,cis-tricyclo[6.3.0.0]undecane (12) in >90% yield. The general method is applied in a synthesis of the hirsutane carbon skeleton [viz. (19)→(20)] found in hirsutic acid (7) and related natural sesquiterpenes.
显示在甲醇中辐照二环戊-1-烯甲烷(5)导致分子内[2 + 2]环加成,然后将甲醇原位添加到假定的中间体双环[2.1.0]戊烷(11)中,顺式,顺式,顺式-三环[6.3.0.0]十一烷(12)在> 90%的产率。的一般方法是在hirsutane碳骨架的[合成应用即。(19)→(20)]存在于水苏酸(7)和相关的天然倍半萜中。