A. Leggio et al., CONVENIENT AND STEREOSPECIFIC HOMOLOGATION OF N-FLUORENYL-METHOXYCARBONYL-ALPHA-AMINO ACIDS TO THEIR BETA-HOMOLOGS, Journal of the Chemical Society. Perkin transactions. I, (13), 1997, pp. 1969-1971
A very simple approach to the enantioselective homologation of alpha-a
mino acids is presented which is based on the formation of N-Fmoc-amin
oacyldiazomethanes with nearly quantitative yields and on the complete
retention of both chiral configuration and N-terminal protecting grou
p in the overall transformation.