摘要:
1,1,1,3,3-Pentafluoropropane-2-one (3) (pentafluoroacetone) is readily obtained from 1,1,1,3,3,3-hexafluoropropane-2-ol by dehydrofluorination using lithium bis(trimethylsilyl)amide, followed by isomerization of 1,1,3,3,3-pentafluoropropene-2-ol. Pentafluoroacetone adds trimethylsilylphosphites to yield alpha-trimethylsiloxyphosphonates which, upon thermolysis, furnish (Z)-1,3,3,3-tetrafluoropropenyldialkylphosphites and (Z)-1,3,3,3-tetrafluoro-2-trimethylsiloxypropene.