Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore.
Org Lett. 2012 Jun 1;14(11):2826-9. doi: 10.1021/ol301044e. Epub 2012 May 14.
K(2)CO(3)-mediated reactions of 6-bromo-2-hexenoates and 7-bromo-2-heptenoate with active methylene compounds deliver highly substituted cyclopentane and cyclohexane derivatives, respectively via a sequence of S(N)2-conjugate addition reactions (formal [4 + 1]- and [5 + 1]-annulation) in a diastereoselective manner.
K(2)CO(3)介导的 6-溴-2-己烯酸酯和 7-溴-2-庚烯酸酯与活性亚甲基化合物的反应,分别以立体选择性方式通过 S(N)2-共轭加成反应(形式上的[4+1]-和[5+1]-环化)序列,以高产率得到高取代的环戊烷和环己烷衍生物。