phenyl (2,3,4,6-tetra-O-benzoyl-β-D-galactopyranosyl)-(1->4)-6-O-(tert-butyldiphenylsilyl)-2-deoxy-2-(2,2,2-trichloroethoxy)carbonylamino-1-thio-β-D-glucopyranoside 、
Acetic acid (2S,3R,4R,5S,6S)-3-acetoxy-5-(4-methoxy-benzyloxy)-2-methyl-6-(2,2,2-trichloro-acetimidoyloxy)-tetrahydro-pyran-4-yl ester 在
三氟甲磺酸 作用下,
以
1,4-二氧六环 、
甲苯 为溶剂,
反应 1.0h,
以71%的产率得到phenyl (2,3,4,6-tetra-O-benzoyl-β-D-galactopyranosyl)-(1->4)[(1->3)-3,4-di-O-acetyl-2-O-(para-methoxybenzyl)-α-L-fucopyranosyl]-6-O-(tert-butyldiphenylsilyl)-2-deoxy-2-(2,2,2-trichloroethoxy)carbonylamino-1-thio-β-D-glucopyranoside