N-叔丁氧羰基-L-谷氨酸 5-苄酯 、
L-Isoleucyl-O-<(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-(1-3)-O-(2-acetamido-4,6-di-O-benzoyl-2-desoxy-α-D-galactopyranosyl)>-L-seryl-L-valin-benzylester 在
2-乙氧基-1-乙氧碳酰基-1,2-二氢喹啉 作用下,
以
二氯甲烷 为溶剂,
以75%的产率得到N-(tert-Butyloxycarbonyl)-L-glutamyl-(5-benzylester)-L-isoleucyl-O-<(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-(1-3)-O-(2-acetamido-4,6-di-O-benzoyl-2-desoxy-α-D-galactopyranosyl)>-L-seryl-L-valin-benzylester