乙酸酐 、
methyl 3-O-(4-O-acetyl-2,6-dideoxy-2-iodo-3-C-methyl-α-L-mannopyranosyl)-2,6-dideoxy-β-D-arabino-hexopyranoside 在
吡啶 作用下,
反应 5.0h,
以78%的产率得到methyl 4-O-acetyl-3-O-(4-O-acetyl-2,6-dideoxy-2-iodo-3-C-methyl-α-L-mannopyranosyl)-2,6-dideoxy-β-D-arabino-hexopyranoside