methyl (phenyl 5-acetamido-7,8,9-tri-O-acetyl-4-O-cyanomethyl-3,5-dideoxy-2-thio-D-glycero-β-D-galacto-2-nonulopyranosid)onate 在
4 A molecular sieve 、
DMTST 、
1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
以97%的产率得到methyl 5-acetamido-7,8,9-tri-O-acetyl-2,6-anhydro-4-O-cyanomethyl-3,5-dideoxy-D-glycero-D-galacto-non-2-enonate