Synthesis of 4-substituted phenylalanine derivatives by cross-coupling reaction of p-boronophenylalanines
作者:Yoshitaka Satoh、Candido Gude、Kenneth Chan、Fariborz Firooznia
DOI:10.1016/s0040-4039(97)10082-x
日期:1997.11
The benzophenone imine of (4-pinacolylborono)phenylalanine ethyl ester (3) undergoes Suzuki-Miyaura coupling reactions with organic halides and triflates to give 4-substituted phenylalanine derivatives. A homochiral boronate ester (7), derived from Seebach's chiral imidazolidinone template, yields the corresponding coupling products under similar conditions with no or little loss of stereochemical
(4-pinacolylborono)苯丙氨酸乙酯(3)的二苯甲酮亚胺与有机卤化物和三氟甲磺酸酯进行Suzuki-Miyaura偶联反应,得到4-取代的苯丙氨酸衍生物。衍生自Seebach手性咪唑啉酮模板的同手性硼酸酯(7)在相似条件下产生相应的偶联产物,而立体化学完整性几乎没有损失。