{2-[(2S,3S,5R,6R)-5-Benzyloxy-3-chloro-6-(2,2-dibromo-ethyl)-tetrahydro-pyran-2-yl]-ethoxy}-tert-butyl-diphenyl-silane 在
三氯化硼 作用下,
以93%的产率得到(2R,3R,5S,6S)-6-[2-(tert-Butyl-diphenyl-silanyloxy)-ethyl]-5-chloro-2-(2,2-dibromo-ethyl)-tetrahydro-pyran-3-ol