The enantioselective construction of quaternary stereocenters still remains significant
challenge in organic synthesis. Herein, an efficient synthetic strategy for the construction
of quaternary stereocenters via palladium-catalyzed asymmetric decarboxylative cycloaddition
of vinylethylene carbonates (VEC) with unsaturated electrophiles is highlighted. The
processes that enable rapid access to methylene acetal protected tertiary vinylglycols,
carbonyl-protected β-substituted β-vinylglycinols, and multifunctionalized tetrahydrofurans
bearing continuous tertiary and vicinal all-carbon quaternary stereocenters in high
yields with high levels of stereoselectivities.
Key words
asymmetric catalysis - quaternary stereocenters - palladium - decarboxylative cycloaddition
- vinylethylene carbonates