Hydrogen bonding mediated enantioselective organocatalysis in brine: significant rate acceleration and enhanced stereoselectivity in enantioselective Michael addition reactions of 1,3-dicarbonyls to beta-nitroolefins
CHEMICAL COMMUNICATIONS, v.47, no.34, pp.9621 - 9623
Abstract
Brine provides remarkable rate acceleration and a higher level of stereoselectivity over organic solvents, due to the hydrophobic hydration effect, in the enantioselective Michael addition reactions of 1,3-dicarbonyls to beta-nitroolefins using chiral H-donors as organocatalysts.