Back to Search
Start Over
Synthesis of α-Methylidene-γ-amino Acid Esters from Aldehydes via an Aminative Umpolung Strategy.
- Source :
- Advanced Synthesis & Catalysis; Oct2014, Vol. 356 Issue 14/15, p3219-3224, 6p
- Publication Year :
- 2014
-
Abstract
- This paper describes an efficient method for the synthesis of α-methylidene-γ-amino acid esters from readily available aldehydes by using aminative umpolung strategy. Electrophilic aromatic aldehydes were converted to α-imino anions via amination with 2,2-diphenylglycine in methanol and subsequent decarboxylation in acetonitrile. The in situ generated α-imino anions displayed high activity in the reaction with Morita-Baylis-Hillman adducts in the presence of 1,4-diazabicyclo[2.2.2]octane (DABCO) as catalyst, to give a variety of substituted α-methylidene-γ-amino acid esters in 54-96% yields with 3.2-7.1:1 diastereoselectivity. The resulting α-methylidene-γ-amino acid esters can be efficiently converted into biologically important α- exo-methylidene-γ-lactams under mild conditions. [ABSTRACT FROM AUTHOR]
- Subjects :
- ORGANIC synthesis
ALDEHYDES
ESTERS
UMPOLUNG
AMINATION
DECARBOXYLATION
ACETONITRILE
Subjects
Details
- Language :
- English
- ISSN :
- 16154150
- Volume :
- 356
- Issue :
- 14/15
- Database :
- Complementary Index
- Journal :
- Advanced Synthesis & Catalysis
- Publication Type :
- Academic Journal
- Accession number :
- 98644049
- Full Text :
- https://doi.org/10.1002/adsc.201400210