3-O-allyloxycarbonyl-6-O-benzyl-2-deoxy-4-O-(1,5-dihydro-3-oxo-3λ5-3H-2,4,3-benzodioxaphophepin-3-yl)-2-(2,2,2-trichloroethoxycarbonylamino)-α-D-glucopyranosyl trichloroacetimidate 、 allyl 4-O-benzyl-2-deoxy-3-O-[(R)-3-(4-trifluoromethylbenzyloxy)tetardecanoyl]-2-[(R)-3-(4-trifluoromethylbenzyloxy)tetradecanoylamino]-β-D-glucopyranoside 在
4 A molecular sieve 、
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
以91%的产率得到[(2R,3S,4R,5R,6R)-2-[[(2R,3R,4R,5S,6R)-5-[(3-oxo-1,5-dihydro-2,4,3lambda5-benzodioxaphosphepin-3-yl)oxy]-6-(phenylmethoxymethyl)-4-prop-2-enoxycarbonyloxy-3-(2,2,2-trichloroethoxycarbonylamino)oxan-2-yl]oxymethyl]-3-phenylmethoxy-6-prop-2-enoxy-5-[[(3R)-3-[[4-(trifluoromethyl)phenyl]methoxy]tetradecanoyl]amino]oxan-4-yl] (3R)-3-[[4-(trifluoromethyl)phenyl]methoxy]tetradecanoate