Pronounced enhancement of stereoselectivity in asymmetric hydrogenation of 2-substituted 2-propen-1-ols by transient acylation
摘要:
In the hydrogenation using a chiral catalyst, Ru2Cl4[(R)-(+)-BINAP](2)NEt(3), aroylation of the allylic hydroxyl group of 2-(hydroxymethyl)4-hydroxy-4-methyl-1-pentene (2b) and 2-(hydroxy-methyl)-3-(1-hydroxycyclohexyl)-1-propene (3b) resulted in pronounced enhancement of asymmetric induction. (C) 1997, Elsevier Science Ltd.