Highly diastereoselective synthesis of arylglycine derivatives via TFA-promoted Friedel–Crafts reactions of phenols with cyclic glyoxylate imines
作者:Yong-Jun Chen、Fei Lei、Li Liu、Dong Wang
DOI:10.1016/s0040-4020(03)01142-6
日期:2003.9
Optically active α-arylglycine derivatives were synthesized by Brønsted acid (TFA)-promoted Friedel–Crafts reaction of various phenols with chiral cyclic glyoxylate imines (2a–c), followed by deprotection with Pd(OH)2/C under H2. The diastereoselectivities of the initially formed F–C reaction products are up to 99%.
通过布朗斯台德酸(TFA)促进的各种酚与手性环状乙醛酸亚胺(2a – c)的Friedel-Crafts反应,然后在H 2下用Pd(OH)2 / C脱保护,可以合成光学活性的α-芳基甘氨酸衍生物。最初形成的F–C反应产物的非对映选择性高达99%。