High Asymmetric Induction in Anionic Amino-Cope Rearrangements Controlled by <i>β</i>-Aminoalcohol Auxiliaries
作者:Steven M. Allin、Martin A. C. Button、Robert D. Baird
DOI:10.1055/s-1998-1880
日期:1998.10
Novel 3-amino-1,5-dienes were prepared with high diastereoselectivity by unprecedented 1,2-addition of allyl Grignard to α,β-unsaturated imines containing β-aminoalcohol auxiliaries. Asymmetric anionic amino-Cope rearrangement of the diastereoisomerically pure 3-amino-1,5-diene substrates proceeded to yield the target 3-substituted aldehyde in good yield and with high levels of asymmetric induction (up to 94% e.e.).
新型3-氨基-1,5-二烯通过前所未有的1,2-加成反应制备,获得了高的非对映体选择性,该反应是将烯丙基格里尼亚加到含有β-氨基醇辅助基团的α,β-不饱和亚胺上。非对称阴离子氨基-科普重排反应对非对映体纯的3-氨基-1,5-二烯底物进行,最终以良好的产率和高水平的非对称诱导(高达94% e.e.)合成了目标3-取代醛。