An efficient approach to d-threo-3-hydroxyaspartic acid for the synthesis of novel l-threo-oxazolines as selective blockers of glutamate reversed uptake
作者:Meri De Angelis、Giuseppe Campiani
DOI:10.1016/j.tetlet.2004.01.081
日期:2004.3
d-threo-3-hydroxyaspartic acid was developed. Starting from l-(2S,3S)-N-benzoyl-3-hydroxyaspartic acid dimethyl ester by a Deoxo-fluor-catalyzed cyclization reaction, an inversion of configuration at the β-center (erythro isomer), was observed. A base-induced epimerization reaction led to the d-trans-isomer, which was hydrolyzed to give d-threo-3-hydroxyaspartic acid with excellent stereoselectivity and overall
开发了一种有效的立体选择性合成策略,用于合成thr --3-羟基天冬氨酸。通过Deoxo-氟催化的环化反应,从1-(2 S,3 S)-N-苯甲酰基-3-羟基天冬氨酸二甲酯开始,观察到β-中心的构型反转(赤型异构体)。碱诱导的差向异构化反应导致了d-反式异构体的水解,得到了具有良好立体选择性和总收率的d-苏式-3-羟基天冬氨酸。从d-苏式-3-羟基天冬氨酸开始,可以立体选择性地合成l-苏式-恶唑啉。