ethyl (3S)-3-[7-[2-(4-carbamimidoylphenyl)ethynyl]-9-chloro-1-methyl-2,5-dioxo-3H-1,4-benzodiazepin-4-yl]butanoate 在
lithium hydroxide 作用下,
以
四氢呋喃 、
甲醇 为溶剂,
以72%的产率得到(S)-3-[7-(4-Carbamimidoyl-phenylethynyl)-9-chloro-1-methyl-2,5-dioxo-1,2,3,5-tetrahydro-benzo[e][1,4]diazepin-4-yl]-butyric acid