Stereoselective Organocatalytic Approach to α,β-Disubstituted-β-amino Acids: A Short Enantioselective Synthesis of Cispentacin
作者:Ana Pou、Albert Moyano
DOI:10.1002/ejoc.201300197
日期:2013.5
α-Branched α,β-unsaturated aldehydes have been tested in the organocatalytic tandem Michael addition/cyclization with N-(benzyloxycarbonyl)hydroxylamine, a reaction which until now has been restricted to α-unsubstituted enals. Startingfrom cyclopentene-2-carbaldehyde, and using diphenylprolinol trimethylsilyl ether as a chiral amine catalyst, this approach has led to the development of a practical