、 O-(Methyl 4,5,7,8-tetra-O-acetyl-3-deoxy-α-<*>-manno-2-octulopyranosylonate)-(2->4)-methyl (5,7,8-tri-O-acetyl-<*>-manno-2-octulopyranosyl bromide)onate 在
mercury dibromide Molekularsieb 4A 作用下,
以
硝基甲烷 、
甲苯 为溶剂,
反应 12.0h,
以30%的产率得到O-(Methyl 4,5,7,8-tetra-O-acetyl-3-deoxy-α-<*>-manno-2-octulopyranosylonate)-(2->4)-methyl 5,7,8-tri-O-acetyl-2,6-anhydro-2,3-dideoxy-<*>-manno-2-octenonate