| 摘要 |
Prepn. of fluorinated dimethyl ethers of formula CF2HOCClxFyH3-(x+y), where x = 0, 1 or 2; y = 1, 2 or 3, and (x + y) = 1, 2 or 3, comprises: chlorinating CHF2OCH3 in the presence of a solvent in an amt. effective to dissolve the mixt. to form a chlorinated admixture contg. at least one cpd. of formula CF2HOCH3-zClz, in which z = 1, 2 or 3; fluorinating the cpd. with one of (anhydrous) HF, metal salts of HF2-, NaF, KF, pyridine, amine and other electron pair donor bases, which form complexes of formula [BH+(HF)x]f- (where B is a donor base), in the absence of a catalyst to obtain a fluorinated admixture contg. a cpd. of formula CF2HOCH3-zFyClz-y. |
