Yh. Chen et al., SELECTIVE DEPROTECTION OF AN ACETAL GROUP IN MONOSACCHARIDE DERIVATIVES AND RELATED-COMPOUNDS USING ME(3)SICH(2)MGCL, Chemical communications, (3), 1996, pp. 327-328
Treatment of an acetal of a contiguous diol with Me(3)SiCH(2)MgCl libe
rates the corresponding diol regioselectively; chelation is used to ra
tionalize the selectivity.