Single enantiomer synthesis of α-(trifluoromethyl)-β-lactam
作者:Václav Jurčík、Alexandra M Z Slawin、David O'Hagan
DOI:10.3762/bjoc.7.86
日期:——
from alpha-(trifluoromethyl)acrylic acid (2). Conjugate addition of alpha-(p-methoxyphenyl)ethylamine ((S)-3b), generated an addition adduct 4b which was cyclised to beta-lactam 5b. Separation of the diastereoisomers by chromatography gave ((alphaS,3S)-5b). N-Debenzylation afforded the desired alpha-(trifluoromethyl)-beta-lactam ((S)-1). The absolute stereochemistry of diastereoisomers 5 was determined