作者:Li-Ping Fan、Ping Li、Xin-Sheng Li、Dong-Cheng Xu、Meng-Meng Ge、Wei-Dong Zhu、Jian-Wu Xie
DOI:10.1021/jo101935k
日期:2010.12.17
The asymmetric domino Michael-SN2 reaction of various 1,3-dicarbonyl compounds to α-bromonitroalkenes is described for the first time, employing readily available cinchona-derived bifunctional thioureas as organocatalysts. The novel transformations were highly regio-, chemo-, diastereo-, and enantioselective, which simultaneously gave the chiral tricyclic 2,3-dihydrofurans, bicyclic 2,3-dihydrofurans
首次描述了各种1,3-二羰基化合物与α-溴硝基烯烃的不对称多米诺骨牌Michael-SN 2反应,采用金鸡纳衍生的双官能硫脲作为有机催化剂。新的转化是高度区域,化学,非对映体和对映体选择性的,同时产生具有两个邻位手性碳中心的手性三环2,3-二氢呋喃,双环2,3-二氢呋喃和四取代的2,3-二氢呋喃。