A practical and cost-effective synthesis of 3,3-difluoropyrrolidine is reported. The synthesis involves the isolation of two intermediates, which are prepared via two efficient through processes: (1) a Claisen rearrangement followed by a Ru(VIII)-catalyzed oxidation to prepare the 2,2-difluoro-succinic acid and (2) an efficient cyclization to form N-benzyl-3,3-difluoropyrrolidinone followed by BH3 center dot Me2S reduction.
GREUTER, HANS;LANG, ROBERT W.;ROMANN, ANDRES J., TETRAHEDRON LETT., 29,(1988) N 27, 3291-3294
作者:GREUTER, HANS、LANG, ROBERT W.、ROMANN, ANDRES J.