(2S,4R)-4-[(R)-2-(Acetylamino-methylsulfanyl)-1-(methoxycarbonylmethyl-carbamoyl)-ethylcarbamoyl]-pyrrolidine-1,2-dicarboxylic acid 1-benzyl ester 2-methyl ester 在
碘 作用下,
以
甲醇 为溶剂,
反应 4.0h,
以36%的产率得到1-dibenzyl 2-dimethyl 4,4'-((3R,8R)-8-formamido-3-((2-methoxy-2-oxoethyl)carbamoyl)-9,12-dioxo-13-oxa-5,6-dithia-2,10-diazatetradecanoyl)(2S,2'S,4R,4'R)-bis(pyrrolidine-1,2-dicarboxylate)