Stereoselective synthesis of S-norvaline and related amino acids through a common intermediate
作者:José C. Espinoza-Hicks、David Chavez-Flores、Gerardo Zaragoza-Galan、Alejandro A. Camacho-Davila
DOI:10.1007/s00726-023-03289-y
日期:2023.7
and ɣ-oxonorvaline. These were synthesized in good yields (45–75%) from the common starting material (S)-allylglycine obtained by asymmetric transfer allylation of glycine Schiff base using the Corey catalyst derived from cinchonidine in more than 97% enantiomeric excess.
据报道,一种不同的对映选择性合成策略可生产非蛋白原性、具有生物活性的天然氨基酸正缬氨酸、5-羟基-4-氧代-L-正缬氨酸和ɣ-氧代正缬氨酸。这些化合物以良好的产率(45-75%)从共同的起始材料(S)-烯丙基甘氨酸中合成,该原料是通过甘氨酸席夫碱的不对称转移烯丙基化获得的,使用衍生自辛可尼丁的Corey催化剂,对映体过量超过97%。