UV photolysis of protected glycines in the presence of di-tert-butyl peroxide, benzophenone and substituted toluenes is shown to lead to selective alkylation at the α-position. Phenylalanines are isolated in yields of generally >50% (based on recovered starting material).
                                    在
过氧化二叔丁基,
二苯甲酮和取代的
甲苯的存在下,受保护的甘
氨酸的紫外线光解显示可导致α位的选择性烷基化。分离出苯丙
氨酸的产率通常> 50%(基于回收的起始原料)。