(S)-N-(2-Pyrrolidinylmethyl)pyrrolidine/trifluoroacetic acid (3:1) combination catalyzed the direct addition of alkyl methyl ketones to β-dimethyl(phenyl)silylmethylene malonate at the methyl terminal with high yield and excellent regio- and enantioselectivity. The silyl group played crucial roles in regioselection and substrate reactivity.
(S)-N-(2-
吡咯烷基甲基)
吡咯烷/
三氟乙酸(3:1)的组合催化烷基甲基酮直接加到β-二甲基(苯基)甲
硅烷基亚
甲基丙二酸酯的甲基末端上,具有高产率和良好的区域选择性。对映选择性。甲
硅烷基在区域选择和底物反应性中起关键作用。