Three new routes to derivatives of alpha-fluoracrylic acid, including a laboratory synthesis and a large-scale method, are reported. The processes are (i) addition of elementary fluorine to acrylic esters and subsequent elimination of HF; (ii) addition of difluorocarbene to isopropenyl methyl ether, oxidation via ring opening and dehalogenation; and (iii) 'nitrofluorination' of 2,3-dichloropropene, hydrolysis and dechlorination.
Process for the fluorination of acrylic acid and derivatives thereof and
申请人:Bayer Aktiengesellschaft
公开号:US05072030A1
公开(公告)日:1991-12-10
Difluoropropionic acid and derivatives thereof are prepared by bringing elemental fluorine in the presence of a solvent into an addition reaction with appropriate acrylic acids or derivatives thereof. In this way, it is also possible to obtain novel fluorinated esters of 2,3-difluoropropionic acid.
VENIT, JOHN J.;DIPIERRO, MICHAEL;MAGNUS, PHILIP, J. ORG. CHEM., 54,(1989) N8, C. 4298-4301
作者:VENIT, JOHN J.、DIPIERRO, MICHAEL、MAGNUS, PHILIP
DOI:——
日期:——
Verfahren zur Fluorierung von Acrylsäure und Derivaten davon sowie neue fluorierte Ester der 2,3-Difluorpropionsäure
申请人:BAYER AG
公开号:EP0383128B1
公开(公告)日:1993-03-31
US5072030A
申请人:——
公开号:US5072030A
公开(公告)日:1991-12-10
Synthese von α-Fluoracrylsäure und Derivaten
作者:K.-R. Gassen、D. Bielefeldt、A. Marhold、P. Andres
DOI:10.1016/s0022-1139(00)80116-5
日期:1991.12
Three new routes to derivatives of alpha-fluoracrylic acid, including a laboratory synthesis and a large-scale method, are reported. The processes are (i) addition of elementary fluorine to acrylic esters and subsequent elimination of HF; (ii) addition of difluorocarbene to isopropenyl methyl ether, oxidation via ring opening and dehalogenation; and (iii) 'nitrofluorination' of 2,3-dichloropropene, hydrolysis and dechlorination.