Glycal Derivatives
3.6
729
⊡ Scheme 55
⊡ Scheme 56
⊡ Scheme 57
⊡ Scheme 58
Glycals have been used extensively as substrates in various approaches to C-glycosyl compounds. Among the studies devoted to the Heck-type catalytic coupling [261] between carbohydrate derivatives and aromatic compounds, there are several examples of the glycal double
bond being preserved during such reaction. For example, in reaction with benzene, peracylated pyranosyl eneones 171 and 172 mainly form unsaturated 1-C-phenyl substituted products
173–176 ( > Scheme 58) [262].
3.6
729
⊡ Scheme 55
⊡ Scheme 56
⊡ Scheme 57
⊡ Scheme 58
Glycals have been used extensively as substrates in various approaches to C-glycosyl compounds. Among the studies devoted to the Heck-type catalytic coupling [261] between carbohydrate derivatives and aromatic compounds, there are several examples of the glycal double
bond being preserved during such reaction. For example, in reaction with benzene, peracylated pyranosyl eneones 171 and 172 mainly form unsaturated 1-C-phenyl substituted products
173–176 ( > Scheme 58) [262].