Highly diastereoselective Michael reaction of ( S )-mandelic acid enolate. Chiral benzoyl carbanion equivalent through an oxidative decarboxylation of α-hydroxyacids
作者:Gonzalo Blay、Isabel Fernández、Belén Monje、José R Pedro、Rafael Ruiz
DOI:10.1016/s0040-4039(02)02099-3
日期:2002.11
The reaction of the lithium enolate of the 1,3-dioxolan-4-one derived from optically active (S)-mandelic acid and pivalaldehyde with α,β-unsaturated carbonyl compounds proceeds readily to give the corresponding Michael adducts in good yields and high diastereoselectivity. Subsequent basic hydrolysis of the acetal and oxidative decarboxylation of the α-hydroxyacid moiety provides chiral 2-substituted