Enantioselective Preparation of Ring-Fused 1-Fluorocyclopropane-1-carboxylate Derivatives: En Route to mGluR 2 Receptor Agonist MGS0028
作者:Fei Zhang、Zhiguo J. Song、Dave Tschaen、R. P. Volante
DOI:10.1021/ol0484512
日期:2004.10.1
[reaction: see text] An approach to the densely functionalized fluorocyclopropane 14, a key framework toward the synthesis of mGluR 2 receptor agonist MGS0028 (1) is reported. The Trost AAA reaction enantioselectively introduced the key allylic stereogenic center and the alpha-fluoroester moiety. Stereoselective epoxidation followed by intramolecular epoxide ring opening efficiently constructed the 1-
[反应:见正文]报告了一种致密化的氟代环丙烷14的合成方法,该方法是合成mGluR 2受体激动剂MGS0028(1)的关键框架。Trost AAA反应对映选择性地引入了关键的烯丙基立体异构中心和α-氟代酯部分。立体选择性环氧化然后分子内环氧化物开环有效地构建了1-氟环丙烷-1-羧酸酯基体。该途径可能是用于简明,高度对映和立体选择性合成1-氟环丙烷-1-羧酸酯衍生物的通用方法。