溴甲苯 、 (2R,3S,4S,5R,6R)-4-Allyloxy-2-allyloxymethyl-6-(2,2,2-trichloro-ethoxy)-tetrahydro-pyran-3,5-diol 在
sodium hydride 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
生成 (2R,3S,4S,5R,6S)-4-Allyloxy-2-allyloxymethyl-3,5-bis-benzyloxy-6-(2,2-dichloro-vinyloxy)-tetrahydro-pyran 、
(2R,3S,4S,5R,6R)-4-Allyloxy-2-allyloxymethyl-3,5-bis-benzyloxy-6-(2,2,2-trichloro-ethoxy)-tetrahydro-pyran