Multicomponent Mannich Reactions with Boron Enolates Derived from Diazo Esters and 9-BBN
作者:Yi Luan、Scott E. Schaus
DOI:10.1021/ol200766t
日期:2011.5.6
3-component Mannich condensation reaction. Catalyzed by Cu(II) salts, the reaction affords the corresponding isocyanate Mannich product: one that can be easily trapped in situ by other nucleophiles. The Mannich condensation corresponds to an α,α-disubstituted enolate addition to imines. The reaction was rendered asymmetric by using the (−)-phenylmenthol ester in good yield and selectivities.