Stereoselective alkylation of tartrate derivatives. A concise route to (+)-O-methylpiscidic acid and natural analogues
作者:Anthony J. Burke、Christopher D. Maycock、M. Rita Ventura
DOI:10.1039/b606362b
日期:——
The lithium enolate of (2S,3S,5S,6S)-dimethoxy-2,3-dimethyl-1,4-dioxane-5,6-dithiocarboxylate 8 undergoes stereoselective mono- and/or dialkylations to afford two new stereogenic centers. The alkylation products obtained possessed a cis stereochemistry, which was confirmed by the synthesis of natural 4′-O-methylpiscidic acid dimethyl ester 2.
(2S,3S,5S,6S)-二甲氧基-2,3-二甲基-1,4-二噻烷-5,6-二羧酸盐 8 的锂烯醇盐经历立体选择性的单烷基化和/或双烷基化反应,生成两个新立体中心。获得的烷基化产物具有顺式立体化学,这通过天然 4′-O-甲基皮斯喀酸二甲酯 2 的合成得到了确认。