A stereoselective, multiple-component approach to α–β-substituted-β-amino carbonyl derivatives
摘要:
A new stereoselective multiple-component condensation is presented. This three-component condensation combines an aldehyde. aniline. and chlorotitanium enolates, to afford alpha-beta-substituted-beta-amino carbonyl compounds as its core structure. (C) 2064 Elsevier Ltd. All right reserved.
Pyrrole-based silyl dienolates undergo asymmetric vinylogous Mukaiyama Mannich reactions with a series of N-aryl aldimines in the presence of the Hoveyda-Snapper amino acid-derived silver(I) catalysts. The Manrdch products alpha,beta-unsaturated delta-ammo-gamma-butyrolactams-are typically obtained in high yields, excellent gamma-site selectivities and anti-diastereoselectivities, and up to 80% enantioselectivity.