Methyl difluorophosphite

Methyl chlorofluorophosphite, 4 141 analysis of, 4 143 Methyl dichlorophosphite, 4 63 Methyl difluorophosphite, 4 141 analysis of, 4 143 Methylgermanium oxide, 3 67 Methylgermanium sulfide, 3 67 Methylgermanium triiodide, 3 64 analysis of, 3 66... 

III) fluoride below 10° and under a pressure of 50 mm. to produce methyl chlorofluorophosphite and methyl difluorophosphite. 

Methyl difluorophosphite is very readily obtained by the action of antimony(III) fluoride on the dichloro ester. The intermediate, partially fluorinated chlorofluoro ester is produced in appreciable yields only under carefully controlled conditions. Although the conditions outlined below, i.e., low temperature, low pressure, and slow rate of addition of fluorinating agent, favor the formation of the chlorofluoro ester, a mixture results, and the yield of the chlorofluoro ester is low compared to that of the difluoro.1... 

Methyl difluorophosphite has been prepared by the fluorination of CH3POCI2 with SbFs. A more satisfactory route is the direct reaction of PF3, alcohol, and a base.2... 

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