F. Ponten et G. Magnusson, C-ALLYLATION OF 1-BROMOSUGAR AND 6-BROMOSUGAR WITH ALLYLIC SULFIDES AND SULFONES, Journal of organic chemistry, 61(21), 1996, pp. 7463-7466
Reaction of the bromosugars 2,3,4,6-tetra-O-acetyl-alpha-D-galactopyra
nosyl bromide (1), methyl 2,3-anhydro-6-bromo-6-deoxy-alpha-D-allopyra
noside (2), and methyl 4-O-benzoyl-6-bromo-6-deoxy-alpha-D-allopyranos
ide (3) with the-allylic sulfides and sulfones 4-9 in the presence of
hexabutyldistannane under photolytic conditions gave the corresponding
alpha-C-allyl galactosides 10-12 and the 6-C-allylated epoxysugars 13
, 15, and 16 in 61-90% yield.