反-1-甲氧基-3-(三甲基硅氧基)-1,3-丁二烯 、
[(2R,3S,4S,5R,6R)-6-[(4-cyanophenyl)methylideneamino]-3,4,5-tris(2,2-dimethylpropanoyloxy)oxan-2-yl]methyl 2,2-dimethylpropanoate 在
zinc(II) chloride 作用下,
以
四氢呋喃 为溶剂,
反应 0.25h,
以71%的产率得到2,2-Dimethyl-propionic acid (2R,3R,4S,5S,6R)-2-[(S)-2-(4-cyano-phenyl)-4-oxo-3,4-dihydro-2H-pyridin-1-yl]-4,5-bis-(2,2-dimethyl-propionyloxy)-6-(2,2-dimethyl-propionyloxymethyl)-tetrahydro-pyran-3-yl ester