Pyrrolidinyl-camphor derivatives have been proven to be efficient organocatalysts for enantioselective conjugate addition of ketones to alkylidene malonates, affording high chemical yields (up to 95 %) of the corresponding products with high to excellent levels of diastereoselectivity (up to >99:1 dr) and enantioselectivity (up to 96 % ee) under solvent-free reaction conditions at ambient temperature.
吡咯烷基-
樟脑衍
生物已被证明是酮与亚烷基
丙二酸酯的对映选择性共轭加成的有效有机催化剂,可提供高
化学产率(高达 95%)的相应产物,并具有高至极好的非对映选择性(高达 >99:1 dr ) 和对映选择性(高达 96% ee),在无溶剂反应条件下,室温。