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DOI: 10.1055/s-0029-1217141
Simple and Efficient Procedure for a Multigram Synthesis of Both trans- and cis-1-Amino-2-(trifluoromethyl)cyclopropane-1-carboxylic Acid
Publication History
Publication Date:
20 November 2009 (online)

Abstract
A simple and efficient procedure for the multigram synthesis of both (±)-trans- and (±)-cis-1-amino-2-(trifluoromethyl)cyclopropane-1-carboxylic acid was developed. The key step of the synthesis is the addition of 1-diazo-2,2,2-trifluoroethane to methyl 2-[(tert-butoxycarbonyl)amino]acrylate, followed by thermal decomposition of the resulting pyrazoline. Gram quantities of trans- and cis-1-amino-2-(trifluoromethyl)cyclopropane-1-carboxylic acid were easily prepared from l-serine in one synthetic run.
Key words
fluorine - alkenes - amino acids - catalysts - diazo compounds
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References
The ¹H NMR spectrum of the isomer 8b is identical to that described in ref. 7b (see the experimental section).