2,5-dioxo-2,3,4,5-tetrahydro-1H-1,4-benzodiazepine-3-acetic acid methyl ester 、 7-chloro-2,5-dioxo-2,3,4,5-tetrahydro-1H-1,4-benzodiazepine-3-acetic acid ethyl ester 、
L-天冬氨酸双苄酯对甲苯磺酸盐 、
靛红酸酐 、
5-氯靛红酸酐 在
(2,5-Dioxo-2,3,4,5-tetrahydro-1H-benzo[e][1,4]diazepin-3-yl)-acetic acid, benzyl ester 、 7-chloro-2,5-dioxo-2,3,4,5-tetrahydro-1H-1,4-benzodiazepine-3-acetic acid benzyl ester 作用下,
以to form 2,5-Dioxo-2,3,4,5-tetrahydro-1H-1,4-benzodiazepine-3-acetic acid benzyl ester (compound 7A) and 7-chloro-2,5-dioxo-2,3,4,5-tetrahydro-1H-1,4-benzodiazepine-3-acetic acid benzyl ester (compound 7B) respectively的产率得到(2,5-Dioxo-2,3,4,5-tetrahydro-1H-benzo[e][1,4]diazepin-3-yl)-acetic acid, benzyl ester