enantioselective strategy for the construction of highly strained spiro[2,3]hexane skeletons from methylenecyclopropanes and a broad selection of α,β-unsaturated aldehydes. The reaction proceeds through a Michael addition followed by ring expansion of methylenecyclopropanes and nucleophilic attack of an enamine to realize the construction of spiro[2,3]hexanes. Key to the success of this approach are the
我们在此报告了一种通用的有机催化对映选择性策略,该策略可用于从
亚甲基环丙烷构建高应变比螺[2,3]己烷骨架,并提供多种α,β-不饱和醛。该反应通过迈克尔加成进行,随后
亚甲基环丙烷的扩环和烯胺的亲核攻击以实现螺[2,3]己烷的构建。该方法成功的关键是利用电子不足的二
氟取代的仲胺催化剂和
亚甲基环丙烷的固有反应性。