申请人:Nappa Mario Joseph
公开号:US20090143604A1
公开(公告)日:2009-06-04
Described herein is a process for the manufacture of hydrofluoroalkanols of the structure R
f
CFClCHROH, comprising reacting a halofluorocarbon of the structure R
f
CFX
2
, wherein each X is independently selected from Cl, Br, and I, with an aldehyde and a reactive metal in a reaction solvent to generate a reaction product comprising a metal hydrofluoroalkoxide, neutralizing said metal hydrofluoroalkoxide to produce a hydrofluoroalkanol, and recovering the hydrofluoroalkanol. Also described herein are methods of manufacturing hydrofluoroalkenes of the structure R
f
CF═CHR from halofluorocarbons of the structure R
f
CFX
2
, wherein each X is independently selected from Cl, Br, and I, comprising (1) reacting halofluorocarbons of the structure R
f
CFX
2
, wherein each X is independently selected from Cl, Br, and I, with an aldehyde and a reactive metal to generate a reaction product comprising a metal hydrofluoroalkoxide, and reductively dehydroxyhalogenating said metal hydrofluoroalkoxide to produce a hydrofluoroalkene or (2) reacting a hydrofluoroalkanol of the structure R
f
CFXCHROH or a hydrofluoroalkoxide of the structure R
f
CFXCHROMX, wherein M is a reactive metal in the +2 oxidation state, with a carboxylic acid anhydride and a reactive metal in a reaction solvent to form a hydrofluoroalkene and isolating the hydrofluoroalkene. In particular, 2,3,3,3,-tetrafluoro-1-propene may be manufactured with this process. Also described are compounds of the formula R
f
CFClCHROC(═O)R′.
本文描述了一种制备结构为RfCFClCHROH的氢氟烷醇的方法,包括将结构为RfCFX2的卤氟烃(其中每个X独立地选自Cl、Br和I)与醛和反应性金属在反应溶剂中反应,生成包含金属氢氟烷氧化物的反应产物,将该金属氢氟烷氧化物中和以产生氢氟烷醇,并回收氢氟烷醇。本文还描述了一种从结构为RfCFX2的卤氟烃(其中每个X独立地选自Cl、Br和I)制备结构为RfCF═CHR的氢氟烯的方法,包括(1)将结构为RfCFX2的卤氟烃(其中每个X独立地选自Cl、Br和I)与醛和反应性金属反应,生成包含金属氢氟烷氧化物的反应产物,并还原脱氢氧卤化金属氢氟烷氧化物以产生氢氟烯,或者(2)将结构为RfCFXCHROH的氢氟烷醇或结构为RfCFXCHROMX的氢氟烷氧化物(其中M是+2氧化态的反应性金属)与羧酸酐和反应性金属在反应溶剂中反应,形成氢氟烯并分离氢氟烯。特别地,2,3,3,3-四氟-1-丙烯可以通过这个方法制备。本文还描述了符合RfCFClCHROC(═O)R′公式的化合物。