(2S,3S)-3-[(2S,5S,6S)-5-((2S,5R,6S)-5-Benzyloxy-6-methyl-tetrahydro-pyran-2-yloxy)-6-methyl-tetrahydro-pyran-2-yloxy]-hex-5-yn-2-ol 在
tungsten pentacarbonyl tetrahydrofuran 、
三乙胺 作用下,
生成 (2S,3S)-3-[(2S,5S,6S)-5-((2S,5R,6S)-5-Benzyloxy-6-methyl-tetrahydro-pyran-2-yloxy)-6-methyl-tetrahydro-pyran-2-yloxy]-2-methyl-3,4-dihydro-2H-pyran