Highly Diastereoselective Methylation of Five-Ring N,O-Acetals



Title:	Highly Diastereoselective Methylation of Five-Ring N,O-Acetals
Author(s):	Koskinen, Ari M.P. ; Brunner, Martin ; Straub, Thomas ; Saarenketo, Pauli ; Rissanen, Kari
Date:	2004
Language:	en
Pages:	3 268-270
Department:	Department of Chemistry
Series:	LETTERS IN ORGANIC CHEMISTRY, Volume 1, issue 3
ISSN:	1570-1786
Keywords:	alkylation, amino acids, diastereoselectivity
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Citation: Koskinen , A M P , Brunner , M , Straub , T , Saarenketo , P & Rissanen , K 2004 , ' Highly Diastereoselective Methylation of Five-Ring N,O-Acetals ' LETTERS IN ORGANIC CHEMISTRY , vol 1 , no. 3 , pp. 268-270 .
Abstract: Highly diastereoselective methylation of (2S,4S)- and (2R,4S)-3-tert-butyl 4-methyl 2-tertbutyloxazolidine-3,4-dicarboxylate (1a/b) is reported. The relative and absolute configuration of the methylated products was assigned by NOESY and confirmed by a crystal structure of 1a.

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