Enantioselective epoxidation of conjugated dienes and enynes. Trans-epoxides from cis-olefins
作者:Nam Ho Lee、Eric N. Jacobsen
DOI:10.1016/0040-4039(91)80212-o
日期:1991.11
Asymmetric epoxidation of conjugated dienes and enynes catalyzed by (salen)Mn(III) complex 1 takes place with high chemoselectivity to afford monoepoxides exclusively. Reactions of cis-enynes proceed with very high levels of asymmetric induction, with trans-alkynyl epoxides as the major products.
(salen)Mn(III)配合物1催化的共轭二烯和烯炔的不对称环氧化反应具有很高的化学选择性,仅生成单环氧化物。顺式烯炔的反应以很高水平的不对称诱导进行,反式炔基环氧化物为主要产物。