Organocatalytic Synthesis of β-Alkylaspartates via β-Lactone Ring Opening
摘要:
[GRAPHICS]Cinchona alkaloid-catalyzed reaction of ethyl glyoxylate with substituted ketenes, formed in situ, gives disubstituted beta-lactones in moderate yield and high enantiomeric excess. Subsequent azide ring opening, reduction, and ester hydrolysis allows access to chiral beta-alkyl aspartates.
Organocatalytic Synthesis of β-Alkylaspartates via β-Lactone Ring Opening
摘要:
[GRAPHICS]Cinchona alkaloid-catalyzed reaction of ethyl glyoxylate with substituted ketenes, formed in situ, gives disubstituted beta-lactones in moderate yield and high enantiomeric excess. Subsequent azide ring opening, reduction, and ester hydrolysis allows access to chiral beta-alkyl aspartates.
Organocatalytic Synthesis of β-Alkylaspartates via β-Lactone Ring Opening
作者:Alan Armstrong、Stephen P. Geldart、Chloe R. Jenner、James N. Scutt
DOI:10.1021/jo701461t
日期:2007.10.1
[GRAPHICS]Cinchona alkaloid-catalyzed reaction of ethyl glyoxylate with substituted ketenes, formed in situ, gives disubstituted beta-lactones in moderate yield and high enantiomeric excess. Subsequent azide ring opening, reduction, and ester hydrolysis allows access to chiral beta-alkyl aspartates.