Feng Yin, Ainash Garifullina and Fujie Tanaka
Org. Biomol. Chem., 2017,15, 6089-6092
DOI:
10.1039/C7OB01484H,
Communication
To concisely synthesize highly enantiomerically enriched 5-alkyl-substituted pyrrolidine-3-carboxylic acids, organocatalytic enantioselective Michael addition reactions of 4-alkyl-substituted 4-oxo-2-enoates with nitroalkanes have been developed. Using the developed reaction method, 5-methylpyrrolidine-3-carboxylic acid with 97% ee was obtained in two steps.