An unusual room temperature beta-lactone decarboxylation facilitated a five-step enantioselective formal synthesis of the cyclopentane core of an estrogen receptor beta-agonist. A computational study probed the underlying factors facilitating unprecedented, rapid decarboxylation. Aryl substitution promotes faster reaction in the retro-[2+2] as a result of conjugative stabilization with the forming
异常的室温β-内酯脱羧促进了
雌激素受体β-激动剂的
环戊烷核心的五步对映选择性形式合成。一项计算研究探究了促成前所未有的快速脱羧的潜在因素。由于与形成的烯烃的共轭稳定作用,芳基取代促进了Retro- [2 + 2]中更快的反应。另外,在这些稠合的β-内酯中的α-酯的构型导致不同的脱羧速率。