Difunctional polyfluoroaromatic derivatives and a process of preparing the same
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United States of America Patent
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Oct 23, 1990
Issued Date -
N/A
app pub date -
May 23, 1989
filing date -
Apr 18, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The difunctional polyfluoroaromatic compounds represented by the formula ##STR1## wherein X and Y are identical and are selected from the class consisting of --COOR.sup.1, --CH.sub.2 NH.sub.2, --CH.sub.2 NCO and ##STR2## wherein R.sup.1 is --H, alkyl and R.sup.2 and R.sup.3 independently are either --H, X or alkyl and n is either 0 or 1 are disclosed. These compounds are derived from those wherein X and Y are --CN which are produced in a solvent specific reaction. The process comprises reacting pentafluorobenzonitrile with a Grignard reagent of the formula CH.sub.3 MgHal, wherein Hal is --Cl or --Br, in the presence of either tetrahydrofuran, 1,3-dioxolane, dimethoxyethane or diglyme. When the solvent employed is tetrahydrofuran, the cyano compound wherein n is 1 is obtained. When the solvent is 1,3-dioxolane, the cyano compound wherein n is 0 is obtained.
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