Method and photographic material and process comprising a benzot

Details Method and photographic material and process comprising a benzot Method and photographic material and process comprising a benzot

1991-06-28

1994-10-04

Wright, Lee C.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified radiation sensitive composition with color...

430553, 430957, G03C 7305

Patent

active

053525701

ABSTRACT:
A new method of preparation of a single isomer of a benzotriazole compound comprises the step of reacting a benzotriazole compound containing symmetrical substituents on the benzo ring with phosgene to produce the corresponding carbamyl chloride. The carbamyl chloride can be reacted with a timeing group of a coupling-off group of a photographic coupler to form a photographic development inhibitor releasing coupler. Such compounds are useful in photographic materials and processes.

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Research Disclosure, Dec. 1989, Item No. 308119, Kenneth Mason Publications Emsworth, Hampshire P010 7DQ, England.

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