The Facile Production of N-Methyl Amino Acids via Oxazolidinones
作者:Luigi Aurelio、Robert T. C. Brownlee、Andrew B. Hughes、Brad E. Sleebs
DOI:10.1071/ch99082
日期:——
A range of oxazolidinones derived from N-carbamoylα-amino acids were prepared by an efficient method as key intermediatesin the synthesis of N-methyl aminoacids and peptides.The method was readily applied to most α-amino acids except those withbasic side chains. The oxazolidinones were converted by reductive cleavageinto N-methyl α-amino acids.
Short synthesis of (3S,6S,9S)-2-oxo-3-(N-Boc-amino)-1-azabicyclo[4.3.0]nonane-9-carboxylic acid methyl ester: Tandem cyclization protocol
作者:Hwa-Ok Kim、Michael Kahn
DOI:10.1016/s0040-4039(97)01492-5
日期:1997.9
A concise enantioselective synthesis of (3S,6S,9S)-2-oxo-3-(N-Boc-amino)-1-azabicyclo[4.3.0]nonane-9-carboxylic acid methyl ester from N-protected glutamic acid is described. (C) 1997 Elsevier Science Ltd.
PROCESS FOR PREPARING ALPHA-CARBOXAMIDE PYRROLIDINE DERIVATIVES