A New Synthesis of <i>p</i>-Hydroxy Phenylglycine and Some Analogues from <i>p</i>-Benzoquinone
作者:Gerardus T. M. Titulaer、Jie Zhu、Antonius J. H. Klunder、Binne Zwanenburg
DOI:10.1021/ol9913183
日期:2000.2.1
[reaction: see text] A new route to p-hydroxy phenylglycine and N-substituted analogues has been developed starting from p-benzoquinone. 1,2-Addition of methyl lithioacetate to p-benzoquinone and subsequent quenching of the oxygen anion with methyl chloroformate, followed by an elimination-addition reaction with an appropriate amine, resulted in the desired amino acid derivatives. A diastereoselectivity
[反应:见正文]从对苯醌开始,已开发出一种新的对羟基苯甘氨酸和N-取代类似物的途径。将1,2-硫代乙酸甲酯加到对苯醌中,随后用氯甲酸甲酯淬灭氧阴离子,然后与适当的胺进行消除加成反应,得到所需的氨基酸衍生物。使用乙酸8-苯基薄荷基酯作为手性助剂可达到60%的非对映选择性。