作者:Marina Rubina、Michael Rubin、Vladimir Gevorgyan
DOI:10.1021/ja034210y
日期:2003.6.1
2,2-Disubstituted cyclopropyl boronates have been synthesized with high degrees of diastereo- and enantioselectivity via the rhodium-catalyzed asymmetric hydroboration of 3,3-disubstituted cyclopropenes. A strong directing effect of ester and alkoxymethyl substituents has been demonstrated. The directing effect was found to be necessary in achieving high degrees of enantiomeric induction. Selected
已经通过铑催化的 3,3-二取代环丙烯的不对称硼氢化反应合成了具有高度非对映选择性和对映选择性的 2,2-二取代环丙基硼酸酯。酯和烷氧基甲基取代基的强导向作用已被证明。发现定向效应对于实现高度的对映体诱导是必要的。选定的环丙基硼衍生物成功地用于 Suzuki 交叉偶联反应,以良好的产率生产相应的旋光芳基和乙烯基环丙烷。