3-deoxy-1,2:5,6-di-O-isoprolylidene-3-isothiocyanato-3-C-methoxycarbonyl-α-D-glucofuranose 、
2,3,4,6-tetra-O-acetyl-β-D-glucopyranosylamine hydrobromide 在
三乙胺 作用下,
以
四氢呋喃 为溶剂,
反应 12.0h,
以76%的产率得到(5S,6S,8R,9R,4'R)-6-(2',2'-dimethyl-1',3'-dioxolan-4'-yl)-8,9-(dimethylmethylenedioxy)-3-(1'',3'',4'',6''-tetra-O-acetyl-2''-deoxy-β-D-glucopyranos-2''-yl)-2-thioxo-7-oxa-1,3-diazaspiro[4.4]nonan-4-one