383-62-0Relevant articles and documents
METHOD FOR PRODUCING DIFLUORO-ACETYL-ACETIC ACID ALKYLESTERS
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Page 13, (2008/06/13)
The invention relates to a three-stage method for producing 4, 4-difluoro-acetyl-acetic acid alkylesters. In a first stage, a reaction of 4-chloro-4, 4-difluoro-acetyl-acetic acid alkylesters with trialkyl-phosphites of formula (III) P(OR1)3 is carried out, wherein R1 is C1-C4 alkyl, the R1 groups can be identical or different for producing alkyl-phosphonic acid esters of formula (IV) which react with amine of formula (V) during a second stage, wherein R2 and R3 are hydrogen or C1-C4 alkyl independent of each other, or jointly CH2-CH2-O-CH2-CH2- for forming enamines of formula (VI), wherein R2 and R3 have already mentioned significance, said enamines being hydrolysed in the presence of an acid during a third stage.
Synthesis, characterisation and mass spectrometric fragmentation of O-(chlorodifluoroacylated) alcohols
Bhadury, Pinaki S.,Palit, Meehir,Sharma, Mamta,Raza, Syed K.,Jaiswal, Devendra K.
, p. 47 - 50 (2007/10/03)
An indirect and uncatalysed esterification of chlorodifluoroacetic acid with polyfluoro and hydrocarbon alcohols has been developed. The method which involves the reaction between sodium chlorodifluoroacetate and alcohols in dimethylformamide (DMF) is par
Process for the preparation of alkyl halodifluoroacetates
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, (2008/06/13)
For the preparation of alkyl halodifluoroacetates, a 1,1-difluorotetrahaloethane is reacted with an alcohol in the presence of air and/or oxygen and a free-radical initiator, such as for example an azo compound, e.g., azobis(isobutyronitrile).
Process for producing carboxylic acid esters from carboxylic acid halides and alcohols
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, (2008/06/13)
A process for preparing carboxylic esters from carboxylic acid halides or carboxylic anhydrides by reacting one of these starting materials with an alcohol under the catalytic action of "onium" or metal salts of carboxylic acids to obtain high yields of products in anhydrous form in a technically simple manner. The process is especially well suited for preparing 1,1,1-trifluoroethyl trifluoroacetate.