N-Hydroxymethyl derivatives of α-amino aldehydes used for the stereoselective syntheses of β-amino-α-hydroxy acids
作者:Youngran Seo、Hyeonjeong Kim、Da Won Chae、Young Gyu Kim
DOI:10.1016/j.tetasy.2014.03.012
日期:2014.4
The N-hydroxymethyl derivatives of α-amino aldehydes 1 were utilized for the effective synthesis of several β-amino-α-hydroxy acid derivatives in a one-pot process starting from the corresponding α-amino aldehydes. Properly protected methyl esters 3 were prepared in 65–79% yields from α-amino aldehyde derivatives 1 with more than 20:1 stereoselectivity. The application of suitably protected β-amino-α-hydroxy
α-氨基醛1的N-羟甲基衍生物被用于从对应的α-氨基醛开始的一锅法中有效地合成几种β-氨基-α-羟基酸衍生物。由α-氨基醛衍生物1制备的,得到适当保护的甲酯3的产率为65-79%,立体选择性超过20:1。生物活性肽Bestatin及其更有效的类似物AHPBA-Val的有效合成,从ent - 3a的高收率中显示了适当保护的β-氨基-α-羟基酯的应用。