Substituted diphenyl ethers
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United States of America Patent
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Jun 14, 1983
Issued Date -
N/A
app pub date -
Jan 13, 1981
filing date -
Jul 18, 1979
priority date (Note) -
Expired
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Abstract
A compound of the formula: ##STR1## and salts and esters thereof, useful as intermediates for the preparation of compounds of the formula ##STR2## wherein R.sup.1 is an alkyl group optionally substituted by one or more fluorine atoms or by an optionally substituted phenyl group R.sup.2 is No.sub.2 or Cl and R.sup.6 is a hydrogen atom or an alkyl group of 1 to 4 carbon atoms.
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