Highly diastereoselective addition of methyl 2-(N-benzylamino)-1-cyclohexenecarboxylate to chiral acrylates
摘要:
Conjugate addition reaction of achiral Methyl 2-(N-benzylamino)-1-cyclohexenecarboxylate 2 to chiral acrylates 4a, 4b, 4c led, after treatment of the primary adducts with sodium methoxyde, to alpha,alpha-disubstituted beta-keto ester 1 with high enantiomeric excesses.
Highly diastereoselective addition of cyclic β-enamino esters to N-acryloyl-(S)-proline derivaties
作者:Katia Hervouet、André Guingant
DOI:10.1016/0957-4166(96)00023-7
日期:1996.2
Considerable asymmetric induction can be obtained by reacting cyclic beta-enamino esters with chiral acrylamides derived from (S)-proline in the presence of Lewis acids.
Methyl methacrylate as acceptor in the asymmetric Michael reaction using chiral β-enaminoesters: Simultaneous, complete stereocontrol of a quaternary carbon center and a tertiary one in the β-position