N-[N-[(2,2,2-trichloroethoxy)carbonyl]-D-phenylalaninyl]-O-(3,4-di-O-benzyl-6-deoxy-α-L-talopyranosyl)-D-allothreonine benzyl ester 、
4-pentenyl 2,4-di-O-benzyl-3-O-[3-O-benzyl-2-O-methyl-4-O-(2,3-di-O-benzyl-4-O-methyl-α-L-rhamnopyranosyl)-α-L-fucopyranosyl]-α-L-rhamnopyranoside 在
biscollidine iodonium perchlorate 、 4 A molecular sieve 作用下,
以
乙醚 、
二氯甲烷 为溶剂,
以60%的产率得到benzyl (2R,3R)-3-[(2R,3R,4R,5R,6S)-3-[(2S,3R,4R,5S,6S)-4-[(2S,3S,4R,5R,6S)-3-methoxy-5-[(2S,3R,4R,5S,6S)-5-methoxy-6-methyl-3,4-bis(phenylmethoxy)oxan-2-yl]oxy-6-methyl-4-phenylmethoxyoxan-2-yl]oxy-6-methyl-3,5-bis(phenylmethoxy)oxan-2-yl]oxy-6-methyl-4,5-bis(phenylmethoxy)oxan-2-yl]oxy-2-[[(2R)-3-phenyl-2-(2,2,2-trichloroethoxycarbonylamino)propanoyl]amino]butanoate