2,3,4,6-Tetra-O-benzoyl-α-D-mannopyranosyl bromide 、
methyl 2-O-benzoyl-4-deoxy-3-O-(2,3,4,6-tetra-O-benzoyl-α-D-mannopyranosyl)-α-D-lyxo-hexopyranoside 在
4 A molecular sieve 、
silver trifluoromethanesulfonate 作用下,
以
二氯甲烷 为溶剂,
反应 0.5h,
以88%的产率得到methyl 2-O-benzoyl-4-deoxy-3,6-di-O-(2,3,4,6-tetra-O-benzoyl-α-D-mannopyranosyl)-α-D-lyxo-hexopyranoside