(2R,3R,4S,5S,6S)-2,6-diallyl-4-(benzyloxy)-5-(4-methoxybenzyloxy)-tetrahydro-2H-pyran-3-ol 、 在
4-二甲氨基吡啶 作用下,
以
甲苯 为溶剂,
反应 12.0h,
以1.0 g的产率得到(2R,3R,4R,5S,6S)-2,6-diallyl-4-(benzyloxy)-5-(4-methoxybenzyloxy)-tetrahydro-2H-pyran-3-yl 2-((2S,3S,4S,5R,6R)-4,5-bis(benzyloxy)-6-(benzyloxymethyl)-3-(tert-butyldimethylsilyloxy)-tetrahydro-2H-pyran-2-yl)acetate