作者:Katsuhiko Iseki、Shin Mizuno、Yoshichika Kuroki、Yoshiro Kobayashi
DOI:10.1016/s0040-4039(98)00334-7
日期:1998.4
(S,S)-N,N-Bis(-α-methylbenzyl)formamide is the first example of chiral formamides that function as Lewis base catalysis to effectively serve catalytic asymmetric synthesis. The chiral formamide in combination with an additive, HMPA, catalyzes allylations of aliphatic aldehydes with allyl- and crotyltrichlorosilanes with high enantioselectivity (up to 98% ee). In the crotylations with (E)-crotyltrichlorosilane
(S,S)-N,N-双(-α-甲基苄基)甲酰胺是手性甲酰胺的第一个例子,该手性甲酰胺起路易斯碱催化作用,有效地用于催化不对称合成。手性甲酰胺与添加剂HMPA的组合,可催化烯丙基和巴豆基三氯硅烷对脂肪醛的烯丙基化反应,具有高对映选择性(最高98%ee)。在与(E)-巴豆基三氯硅烷的丁酰化中,环己烷甲醛和肉桂醛分别仅具有98%和94%的ee's给出相应的抗均丙醇。