Coupler intermediates and their formation

Details Coupler intermediates and their formation Coupler intermediates and their formation

1991-09-24

1993-05-25

Dees, Jose G.

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

Organic compounds

Carboxylic acid esters

564223, 564443, C07C 6714

Patent

active

052141942

ABSTRACT:
A process for the preparation of 5-substituted 2-aminophenols via nitrones, comprises two reactions. First, a nitrone is reacted with a trihaloacetyl halide to regiospecifically convert the nitrone to a 5-substituted-2-aminophenol derivative (I). Subsequently, the derivative is hydrolyzed to form the 5-substituted-2-aminophenol. The product is useful as a chemical intermediate, e.g. for the preparation of couplers used in photographic chemistry.

REFERENCES:
patent: 4127671 (1978-11-01), Cognacq
patent: 4568763 (1986-02-01), Davenport et al.
patent: 4584318 (1986-04-01), Peake et al.
patent: 4665216 (1987-05-01), Horlenko et al.
Liotta et al., J. Org. Chem. 39, 1976, 2718-2722 (1974).
Armen et al., Tetrahedron Letters, 43, 4197 to 4200, (1979).
Liotta et al., J. Org. Chem. 39, 3445-3446, (1973).
Stahl et al., J. Org. Chem. 45, 1197-1202, (1980).
Heistand II et al., J. Org. Chem. 43, 3613-3615, (1978).

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