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- W2073193702 startingPage "1948" @default.
- W2073193702 abstract "Cleavage of 3,3,4-trifluoro-2,2-dimethyloxetane ( I ) in an aqueous solution of sulphuric acid, phosphoric acid, hydrogen chloride, or hydrogen bromide gave a mixture of 2,2-difluoro-3-methyl-3-butenal ( II ) and 5,5-difluoro-2-(1,1-difluoro-2-hydroxy-2-methylpropyl)-4-hydroxy-6,6-dimethyl-1,3-dioxane ( VIa ); in the cleavage effected by hydrochloric or hydrobromic acid the mixture also contained 3-chloro- or 3-bromo-2,2-difluoro-3-methyl-1,1-butanediol ( Vb or Vc ). In alcoholic solutions of the mineral acids the cleavage afforded the corresponding acetals of butenal II and 2,2-difluoro-3-hydroxy-3-methylbutanal ( IIIa ). The action of sulphuric acid in the presence of acetyl chloride or acetanhydride led to 1-chloro-2,2-difluoro-3-methyl-3-butenyl acetate ( IVd ) or 2,2-difluoro-3-methyl-3-butenylidene diacetate ( IVe ), as the main product. Butenal II was a sole product of the cleavage of oxetane I by polyphosphoric acid at 150-160 °C in the gaseous phase. At temperatures above 180 °C there were also formed (in addition to butenal II ) 1,1,5,5-tetrafluoro-2,6-dimethyl-1,6-heptadiene-4-ol ( IX ) and its formate ( X )." @default.
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- W2073193702 date "1985-01-01" @default.
- W2073193702 modified "2023-09-25" @default.
- W2073193702 title "Cleavage of 3,3,4-trifluoro-2,2-dimethyloxetane by mineral acids" @default.
- W2073193702 doi "https://doi.org/10.1135/cccc19851948" @default.
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