(-)-(1R)-(1α,2β,3β,4α,6β)-2-O,3-N-carbonyl-6-(2,3-dihydro-2-oxo-4,5-diphenyl-3-oxazolyl)-4-O-methyl-3-(methylamino)-1,2,4-cyclohexanetriol 、 Acetic acid (3R,6S)-3-(2,4-dinitro-phenylamino)-6-[(2,4-dinitro-phenylamino)-methyl]-tetrahydro-pyran-2-yl ester 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
反应 1.0h,
以51%的产率得到(3aR,4S,6S,7R,7aR)-7-{(2R,3R,6S)-3-(2,4-Dinitro-phenylamino)-6-[(2,4-dinitro-phenylamino)-methyl]-tetrahydro-pyran-2-yloxy}-4-methoxy-3-methyl-6-(2-oxo-4,5-diphenyl-oxazol-3-yl)-hexahydro-benzooxazol-2-one