Abstract
Abstract The asymmetric methylation of the N-benzylidene-Dl-phenylalanine methyl ester was carried out in the presence of lithium salts of secondary amines derived from (S)-proline. The lithium amides of poly(imino-1-isobutylethylene) and its corresponding low-molecular-weight model compound, derived from (S)-leucine, were similarly used in order to examine the polymer effects with regard to the stereoselectivity.
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