methyl 4-tert-butoxycarbonylaminomethyl-2-methoxycarbonylmethylaniline 、
(S)-9-chloro-5-carboxymethyl-6,7-dihydro-1H, 5H-pyrido[1,2,3-de]quinoxaline-2,3-dione 在
三乙胺 作用下,
以
乙醚 、
二氯甲烷 为溶剂,
以74%的产率得到(S)-9-chloro-5-[p-tert-butoxycarbonylaminomethyl-o-(methoxycarbonylmethyl)phenylcarbamoylmethyl]-6,7-dihydro-1H, 5H-pyrido[1,2,3-de]quinoxaline-2,3-dione