The unexpected formation of bicyclo[2.2.1]heptane derivatives by Lewis acid-catalyzed transannular double cyclization
作者:Vattoly J. Majo、Shuichi Suzuki、Masahiro Toyota、Masataka Ihara
DOI:10.1039/b005727o
日期:——
unexpectedly led to the formation of bicyclo[2.2.1]heptane derivatives 18 and 19a. Since the formation of spiro compounds by allylsilane terminated domino reaction has no precedent in literature, we extended the reaction conditions to unactivated olefins. Spontaneous aromatization accompanied by bicyclic ring formation was observed in these cases. Bicyclo[2.2.1]heptane derivative 11 was also formed in
尝试合成环戊二烯骨架 紫杉烷 分子内的路易斯酸催化细穗–樱井 环化在17中具有醛部分的烯丙基硅烷的生成,出乎意料地导致了双环[2.2.1]庚烷衍生物18和19a的形成。自形成以来螺化合物 经过 烯丙基硅烷 终止多米诺反应在文献中尚无先例,我们将反应条件扩展至未激活 烯烃。在这些情况下,观察到自发芳香化并伴有双环形成。双环[2.2.1]庚烷衍生物11也是由分子内SmI 2介导的酮基–高产率形成的烯烃 的耦合 醛在羟基砜10中。