A Practical Large-Scale Synthesis of (3<i>R</i>,4<i>R</i>)-4-(Hydroxymethyl)pyrrolidin-3-ol via Asymmetric 1,3-Dipolar Cycloaddition
作者:Pravin L. Kotian、Tsu-Hsing Lin、Yahya El-Kattan、Pooran Chand
DOI:10.1021/op049768k
日期:2005.3.1
(3R,4R)-4-(Hydroxymethyl)pyrrolidin-3-ol (1), which is a useful intermediate for the synthesis of various bioactive molecules, has been synthesized in 51% overall yield by 1,3-dipolar cycloaddition reaction from the dipolarophile, (E)-3-benzyloxypropenoyl-(2‘S)-bornane-10,2-sultam (5), and the achiral ylide precursor, N-(benzyl)-N-(methoxymethyl)-N-(trimethylsilylmethyl)amine (6), without using chromatography
(3 R,4 R)-4-(羟甲基)吡咯烷-3-醇(1)是合成各种生物活性分子的有用中间体,已通过1,3-偶极环加成法以51%的总产率合成从亲偶极反应,(ê)-3- benzyloxypropenoyl-(2'小号)-bornane-10,2-磺内酰胺(5),和非手性前体叶立德,ñ - (苄基) - ñ - (甲氧基甲基) - ñ - (三甲基甲硅烷基甲基)胺(6),无需使用色谱法,随后用LAH还原并进行催化氢化。非对映异构体7和8经结晶分离,并开发出有效的方法用于随后的反应,得到1。