Construction of Asymmetric Quaternary Carbon Center Containing Heteroatom via Regioselective Cleavage of Cyclopropane Ring Mediated by Mercury(II) Salt.
作者:Yoshiji TAKEMOTO、Jun TAKEUCHI、Taiichi OHRA、Naoyoshi MAEZAKI、Tetsuaki TANAKA、Chuzo IWATA
DOI:10.1248/cpb.41.2034
日期:——
(6S, 7S)-1-Oxa-7-bromomethylspiro[5.5]undecanes (12 and 13) were synthesized from the optically active alkenyl sulfoxide (7). The key step involves a tandem regioselective cleavage of cyclopropane ring and stereoselective nucleophilic cyclization of the cyclopropylcarboxylic acid (11).
(6S, 7S)-1-氧杂-7-溴甲基螺[5.5]十一烷(12 和 13)是由具有光学活性的烯基亚砜(7)合成的。关键步骤包括环丙烷环的串联区域选择性裂解和环丙基羧酸的立体选择性亲核环化 (11)。