Process of preparation of tetrafluoro 2,3-dihydrobenzofurans

Details Process of preparation of tetrafluoro 2,3-dihydrobenzofurans Process of preparation of tetrafluoro 2,3-dihydrobenzofurans

1985-04-19

1988-03-08

Schwartz, Richard A.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548454, 549470, C07D30782

Patent

active

047300620

ABSTRACT:
Tetrafluorobenzofurans of the formula ##STR1## are prepared by contacting, at elevated temperature in an aprotic solvent, an ether of the formula ##STR2## with a catalytic mixture of metallic cooper and a polydentate or other ligand, wherein R.sup.1 is hydrogen, nitro, amino, phthalimido or acetylimido, R.sup.2 is at least one of hydrogen, halo, cyano, alkyl, hydroxy, alkoxy, acyl, acyloxy, alkoxycarbonyl, alkoxycarbonylalkyl, phenyl, phenyloxy, trifluoromethyl or dialkylamino. The products are intermediates in the preparation of pyrazoline insecticides.

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