123632-23-5Relevant academic research and scientific papers
Cis-4-(2,2,3,3-tetrafluoropropoxy)-cinnamonitrile and trans-4-(2,2,3,3-tetrafluoropropoxy)-cinnamonitrile and a process for their preparation
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, (2008/06/13)
The present invention relates to the compounds cis-4-(2,2,3,3-tetrafluoropropoxy)cinnamonitrile and trans-4-(2,2,3,3-tetrafluoropropoxy)cinnamonitrile and to a process for their preparation. The process relates to the preparation of cis-4-(2,2,3,3-tetrafluoropropoxy)cinnamonitrile and trans-4-(2,2,3,3-tetrafluoropropoxy)cinnamonitrile or optionally one of these two compounds, by fractionally distilling a mixture containing cis- and trans-4-(2,2,3,3-tetrafluoropropoxy)cinnamonitrile under reduced pressure, separating off a main fraction containing at least 80% by weight of cis-4-(2,2,3,3-tetrafluoropropoxy)cinnamonitrile and a main fraction containing at least 80% by weight of trans-4-(2,2,3,3-tetrafluoropropoxy)cinnamonitrile, further purifying these main fractions by means of fractional crystallization or melt crystallization or adjusting one of these main fractions by isomerization to the cis/trans isomer ratio corresponding to the particular thermodynamic equilibrium and returning it to the process and returning the remaining fractions to the process directly or after isomerization.
Process for the preparation of 4-fluoroalkoxycinnamonitriles
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, (2008/06/13)
Process for the preparation of 4-fluoroalkoxycinnamonitriles. The invention relates to a process for the preparation of fluoroalkoxycinnamonitriles of the formula (I) STR1 in which n is 1 to 8 and m is 1 to 17, where m≤2n+1, by reacting 4-fluorobenzaldehy
