Efficient routes to pyranosidic homologated conjugated enals and dienes from monosaccharides
作者:J. Cristóbal López、Eric Lameignère、Catherine Burnouf、María de los Angeles Laborde、Alberto A. Ghini、Alain Olesker、Gabor Lukacs
DOI:10.1016/s0040-4020(01)87245-8
日期:1993.8
have been designed in the context of the preparation of useful chiral building blocks from monosaccharides. Addition of vinylmagnesium bromide onto ulose , followed by acetal ring opening; benzoate protection at C-4 and C-6; and dehydration of the tertiary hydroxyl group, mediated by thionyl chloride, reveals to be a straigthforward route to diene . Analogous dehydration on conformationally rigid was