moieties. A stepwise sequential route was used to assemble the various components of these ferrocene derivatives. The resulting bifunctional catalysts were used successfully in asymmetric Michael additions of 1,3-dicarbonyl compounds to β-nitrostyrenes. The corresponding products were obtained in high yields and in good to excellent enantioselectivities and diastereoselectivities under mild conditions by
本报告描述了含有
金鸡纳
生物碱部分的基于
方酸酰胺或
硫脲的双功能催化剂的八种
二茂铁衍
生物的合成。使用逐步顺序路线来组装这些
二茂铁衍
生物的各种组分。所得双功能催化剂成功用于 1,3-二羰基化合物与
β-硝基苯乙烯的不对称迈克尔加成反应。通过使用 1 mol% 的催化剂,在温和条件下以高收率和良好到优异的对映选择性和非对映选择性获得了相应的产物。