A convenient two step transformation of tyrosine into the antihypertensive amino acid (S)-4-hydroxy-3-hydroxymethylphenylalanine
作者:Pietro Allevi、Riccardo Cribiù、Mario Anastasia
DOI:10.1016/j.tetasy.2004.02.031
日期:2004.4
Treatment of tyrosine with paraformaldehyde and catalytic amounts of p-toluenesulfonic acid, at reflux in toluene, directly generates benzyl (S)-4-(4H-1,3-benzodioxin-6-ylmethyl)-5-oxo-1,3-oxazolane-3-carboxylate, which on treatment with boron trichloride in dichloromethane, affords (S)-4-hydroxy-3-hydroxymethylphenylalanine. (C) 2004 Published by Elsevier Ltd.