methyl (R)-1-[2-hydroxy-3-(2-methoxy-3,4-dioxocyclobut-1-enylamino)benzoyl]pyrrolidine-2-carboxylate 、 C-[(R)-C-(5-methylfuran-2-yl)-C-tetrahydrothiophen-2-yl]methylamine 在
silica gel 、
ethyl acetate dichloromethane 作用下,
以
甲醇 为溶剂,
反应 14.0h,
以538 mg of methyl (R)-1-[2-hydroxy-3-(2-{[(5-methylfuran-2-yl)-(tetrahydrothiophen-2-yl)methyl]amino}-3,4-dioxocyclobut-1-enylamino)benzoyl]pyrrolidine-2-carboxylate were obtained in the form of a yellow solid的产率得到methyl (R)-1-[2-hydroxy-3-(2-{[(5-methylfuran-2-yl)-(tetrahydrothiophen-2-yl)methyl]amino}-3,4-dioxocyclobut-1-enylamino)benzoyl]pyrrolidine-2-carboxylate