作者:Timothy J. Donohoe、Paul C. M. Winship、Ben S. Pilgrim、Daryl S. Walter、Cedric K. A. Callens
DOI:10.1039/c0cc01342k
日期:——
A novel osmium-catalysed oxidative cyclisation of 1,2-diols bearing a pendant vinyl silane affords THFs that contain silicon functionality at the ring junction. When the cyclisation occurs onto a vinyl benzyldimethylsilyl group, the resulting silyl group can act as a masked hydroxyl group and undergo a Fleming–Tamao type oxidation at a later stage to form the corresponding lactol. The scope of this reaction can also be extended beyond 1,2-diols and applied to the cyclisation of α-hydroxy-sulfonamides and α-hydroxy-amides.