溴甲苯 、 (1R,3R,4S,7S,8S)-3-((2R,3R,4S,5R,6S)-4,5-Bis-benzyloxy-2-benzyloxymethyl-6-methoxy-tetrahydro-pyran-3-yloxy)-7-hydroxy-8-methoxy-2,5-dioxa-bicyclo[2.2.2]octane-1-carboxylic acid 在
tetrabutylammonium iodide 、
potassium hydrogencarbonate 作用下,
以
DMF (N,N-dimethyl-formamide) 为溶剂,
反应 5.0h,
生成 methyl 2,3,6-tri-O-benzyl-4-O-(2,6-anhydro-5-C-benzyloxycarbonyl-3-O-methyl-β-D-mannopyranosyl)-α-D-glucopyranoside