Chiral Acetals as Stereoinductors: Diastereoface Selective Alkylation of Dihydrobenzoxazine-Derived Amide Enolates
作者:Johann Mulzer、Oliver Langer、Martin Hiersemann、Jan W. Bats、Jürgen Buschmann、Peter Luger
DOI:10.1021/jo000352o
日期:2000.10.1
Novel dihydrobenzoxazine-derived acetals of type 3 have been developed for asymmetric C-alkylations of propionyl amide enolates. High stereoselectivities are obtained for amides 15 and 22 which are rationalized in terms of intramolecular metal chelate formation.