Chirality transfer in the aza-[2,3]-Wittig sigmatropic rearrangement
作者:James C. Anderson、J. Gair Ford、Matthew Whiting
DOI:10.1039/b510756c
日期:——
The aza-[2,3]-Wittig sigmatropicrearrangements of substrates derived from enantiomerically pure alanine, valine and serine with phenyl and ester anion stabilising groups were investigated for their efficiency in chirality transfer. It was found that a methyl substituent at the stereogenic centre of the rearrangement precursors was inadequate to control the alkene stereoselectivity and enantioselectivity