Studies on Chiral Organosulfur Compounds. VI. The Use of a Chiral Diene Bearing an Optically Active Sulfinylmethyl Group in the Lewis Acid-Catalyzed Intramolecular Asymmetric Hetero Diels-Alder Reaction.
作者:Kunio HIROI、Masayuki UMEMURA、Yoko TOMIKAWA、Masamitsu KANEKO、Fumiko KATO
DOI:10.1248/cpb.45.759
日期:——
An asymmetric Diels-Alder reaction with a diene bearing a chiral sulfinyl group is described. The Lewis acid-catalyzed intramolecular asymmetric hetero Diels-Alder reaction of a chiral α'-sulfinyl-α, β-unsaturated ketone derived from 3-methylcitronellal produced optically active 4a, 5, 6, 7, 8, 8a-hexahydro-1H-2-benzopyran derivatives. On the basis of the stereochemical results obtained, a plausible mechanism for the asymmetric induction is presented.
描述了一种带有手性亚磺酰基的二烯的不对称 Diels-Alder 反应。在路易斯酸催化下,由 3-甲基香茅醛衍生的手性 α'-亚磺酰基-α, β-不饱和酮发生了分子内不对称杂化 Diels-Alder 反应,生成了具有光学活性的 4a、5、6、7、8、8a-六氢-1H-2-苯并吡喃衍生物。根据所获得的立体化学结果,提出了不对称诱导的合理机制。