Add time:08/15/2019         Source:sciencedirect.com

The title compound (S)-α-methylserinal acetonide has been efficiently prepared from (S)-α-methylserine, which is readily available in enantiomerically pure form by Curtius rearrangement of α,α-dialkyl 2-cyanoesters obtained by diastereoselective alkylation of (1S,2R,4R)-10-dicyclohexylsulfamoylisobornyl 2-cyanopropanoate using methoxymethyl iodide or paraformaldehyde as electrophiles by an extension of our recently developed methodology for the synthesis of α,α-dialkylamino acids.

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