An effective method for controlling 3,4-stereochemistry of aldols. Direct preparation of optically active 2,3-anti-3-hydroxy-2-methyl carbonyl compounds
作者:Fumie Sato、Masato Kusakabe、Toshihiko Kato、Yuichi Kobayashi
DOI:10.1039/c39840001331
日期:——
Both 3,4-syn- and 3,4-anti-aldols can be prepared selectively from 2-methyl-3-trimethylsilylalk-3-enyl carbonyl compounds via 1,2-asymmetric induction; thus optically active 2,3-anti-3-hydroxy-2-methyl carbonyl compounds can be prepared by the reaction of optically active (R)-2-methyl-3-trimethylsilylbut-3-enal (1) with the lithium enolate of 2,6-di-t-butyl-4-methylphenyl propionate.
3,4-顺-和3,4-抗-羟醛可以由2-甲基-3-三甲基甲硅烷基链-3-烯基羰基化合物经1,2-不对称诱导选择性地制备。因此,可以通过使旋光性的(R)-2-甲基-3-三甲基甲硅烷基丁-3-烯醛(1)与烯醇式锂的反应制得旋光性的2,3-抗-3-羟基-2-甲基羰基化合物。 2,6-二叔丁基-4-甲基苯基丙酸酯。