Chelation Control in the [3 + 3] Annulation Reaction of Alkoxy-Substituted 1,1-Diacylcyclopropanes with 1,3-Bis(trimethylsilyloxy)-1,3-butadienes. Diversity-Oriented Synthesis of Isochromanes
作者:Vahuni Karapetyan、Satenik Mkrtchyan、Jennifer Hefner、Christine Fischer、Peter Langer
DOI:10.1021/jo902334q
日期:2010.2.5
chelation-controlled [3 + 3] cyclization/cyclopropane opening reactions of 1-trimethylsilyloxy-1,3-butadienes with benzyloxy- or methoxy-substituted 1,1-diacylcyclopropanes. A number of benzyloxy-substituted derivatives were transformed into isochromanes by deprotection and subsequent cyclization. Mixed chromanes−isochromanes were prepared starting with 1,3-bis(silyloxy)-1,3-butadienes containing a remote
通过1-三甲基甲硅烷氧基-1,3-丁二烯与苄氧基或甲氧基取代的1,1-二酰基环丙烷的螯合控制的[3 + 3]环化/环丙烷开环反应制备官能化的芳烃。通过脱保护和随后的环化作用,许多苄氧基取代的衍生物被转化为异色烷。从含有一个偏氯基团的1,3-双(甲硅烷氧基)-1,3-丁二烯开始制备混合的苯并二氢-异苯并二氢吡喃。