作者:Leilei Wang、Xiaojing Zhang、Dawei Ma
DOI:10.1016/j.tet.2012.05.088
日期:2012.9
to be effective to catalyze the Michael addition of aldehydes to 3-substituted 3-nitroacrylates. The reaction provided syn,anti-Michael adducts with good diastereoselectivity and excellent enantioselectivity. Some β-aryl and α-methyl substituted nitroolefins also worked under these conditions, although prolonging reaction time was required. These adducts could be used for assembling 2,3,4-trisubstituted
发现O -TMS保护的二苯基-脯氨醇和苯甲酸的组合可有效催化醛向3-取代的3-硝基丙烯酸酯的迈克尔加成。该反应提供了具有良好的非对映选择性和优异的对映选择性的顺式,抗迈克尔加合物。尽管需要延长反应时间,但某些β-芳基和α-甲基取代的硝基烯烃也可在这些条件下起作用。这些加合物可用于通过简单的氢化组装2,3,4-三取代的吡咯烷。