Process for preparing intermediates for the synthesis of antifun

Details Process for preparing intermediates for the synthesis of antifun Process for preparing intermediates for the synthesis of antifun

1994-05-09

1995-08-15

Dees, Jose G.

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

Organic compounds

Carboxylic acid esters

C07C 6976

Patent

active

054420938

ABSTRACT:
Disclosed is a process for preparing compounds of the formula I ##STR1## wherein R is C.sub.1 -C.sub.6 alkyl, comprising heating a mixture of a difluorobenzene derivative, allene, a dialkyl malonate of the formula CH.sub.2 (CO.sub.2 R).sub.2, wherein R is C.sub.1 -C.sub.6 alkyl, and a base, in a polar organic solvent in the presence of a catalyst.

REFERENCES:
patent: 5039676 (1991-08-01), Saksena et al.
Advance Organic Chemistry, 3rd Edition, Mar., 1985, pp. 642-643.
Ahmar, et al., Tet. Lett., 25, (No. 40) 4505-4508 (1984).
Ahmar, et al., Tetrahedron, 43, (No. 3) 513-526 (1987).
Brenda, et al., Syn. Lett., (No. 11) 809-810 (1991).
Coulson, J. Org. Chem., 38, (No. 8) 1483-1490 (1973).
Austin, et al., J. Org. Chem., 46, 2280-2286 (1981).

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