An expeditious construction of polycyclic ketals: synthesis of fused seven-membered rings and substituted naphthalenes
作者:Issam Hanna、Valérie Michaut、Louis Ricard
DOI:10.1016/s0040-4039(00)01906-7
日期:2001.1
of a catalytic amount of TMSOTf in acetonitrile, afforded a polycyclic acetal 6 by domino nucleophilic substitution, annulation and intramolecular Friedel–Crafts alkylation reaction sequence. Acid-mediated cleavage of the acetal moiety led to fused seven-membered carbocyclic rings or to substituted naphthalenes.
在催化量的TMSOTf的存在下,用1-(三甲基甲硅烷氧基)环戊烯处理由二恶英和甲氧基苯乙酮容易制得的烯丙醇5,通过多米诺亲核取代,环化和分子内Friedel-Crafts烷基化反应得到多环缩醛6顺序。缩醛部分的酸介导裂解导致稠合的七元碳环或取代的萘。