[(2R,3S,4R,5R)-5-(9H-fluoren-9-ylmethoxycarbonylamino)-3-[(3-oxo-1,5-dihydro-2,4,3lambda5-benzodioxaphosphepin-3-yl)oxy]-2-(phenylmethoxymethyl)-6-(2,2,2-trichloroethanimidoyl)oxyoxan-4-yl] (3R)-3-tetradecanoyloxytetradecanoate 、 (2R,3R,4R,5S,6R)-3-Azido-5-benzyloxy-6-hydroxymethyl-2-phenylsulfanyl-tetrahydro-pyran-4-ol 在
三氟甲磺酸三甲基硅酯 作用下,
以68%的产率得到[(2R,3R,4R,5S,6R)-2-[[(2R,3S,4R,5R,6R)-5-azido-4-hydroxy-3-phenylmethoxy-6-phenylsulfanyloxan-2-yl]methoxy]-3-(9H-fluoren-9-ylmethoxycarbonylamino)-5-[(3-oxo-1,5-dihydro-2,4,3lambda5-benzodioxaphosphepin-3-yl)oxy]-6-(phenylmethoxymethyl)oxan-4-yl] (3R)-3-tetradecanoyloxytetradecanoate