A New General and Facile Method for the Synthesis of 4-Alkyl-1,3-oxazoline-4-carboxylic Acids from <b><i>N</i></b>-Acyl-2-alkylserines
作者:Janina Kamińska、Sebastian Olczyk、Beata Kolesińska、Zbigniew Kamiński
DOI:10.1055/s-2007-983708
日期:2007.6
A new synthesis of 4-alkyl-1,3-oxazoline-4-carboxylic acids involves the thermal rearrangement of 4-alkyl-4-hydroxymethyl-1,3-oxazolin-5-ones prepared from N-acyl-2-alkylserines or N-protected peptides with a C-terminal 2-alkylserine residue. The rearrangement is fast and affords HPLC pure title compounds in 68-96% yield both from racemic and enantiomerically pure N-acyl-2-alkyl serines as well as from respective peptides.
一种 4-烷基-1,3-恶唑啉-4-羧酸的新合成方法是对由 N-酰基-2-烷基丝氨酸或具有 C 端 2-烷基丝氨酸残基的 N-保护肽制备的 4-烷基-4-羟甲基-1,3-恶唑啉-5-酮进行热重排。该重排反应速度快,可从外消旋和对映体纯的 N-酰基-2-烷基丝氨酸以及相应的肽中得到 HPLC 纯度为 68-96% 的标题化合物。