Direct Vinylogous Mannich-Type Reactions via Ring Opening and Rearrangement of Vinyloxiranes
作者:Mark Lautens、Eiji Tayama、Duy Nguyen
DOI:10.1021/ol036153j
日期:2004.2.1
2-methyl-2-vinyloxirane as a masked dienolate has been successfully demonstrated in the direct vinylogous Mannich-type reaction with an alpha-imino ester as an electrophile. The Mannich adduct was a useful intermediate en route to cis-5-substituted pipecolinic acid ethyl ester under simple hydrogenation conditions.
[反应:见正文]在以α-亚氨基酯为亲电子试剂的直接乙烯基类Mannich型反应中,已成功证明了2-甲基-2-乙烯基环氧乙烷作为掩蔽的二烯酸酯的首次合成应用。曼尼希加合物在简单的氢化条件下是顺式5取代的胡椒酸乙酯的有用中间体。