溴代丙二酸酯结合盖布瑞尔法亦可 例： tCoo吧2 CICH-CH2SCH3 COOEt COOEt NH2 NaOH HCI CCH,cH,sCH,9入 CH3SCH2CH2-CHCH2OOH COOEt 50%蛋胺酸 Organic Chem Organic Chem 溴代丙二酸酯结合盖布瑞尔法亦可 例： NK O O N O O CH COOEt COOEt ClCH2CH2 SCH3 N O O C COOEt COOEt CH2CH2 SCH3 NaOH HCl CHCH2OOH NH2 CH3 SCH2CH2 50% 蛋胺酸 BrCH(COOEt) 2