content_image/933599.jpg content_image/933609.jpg
# United States Patent [19] 

# Bader et al. 

# [54] PROCESS FOR PROCESSING SILVER HALIDE DEVELOPING AGENTS 

[75] Inventors: Henry Bader, Newton Center; Charles E. Whitten, Winchester, both of Mass. 

[73] Assignee: Polaroid Corporation, Cambridge; Mass. 

[21] Appl. No.: 784,933 

[22] Filed: Apr. 5, 1977 

[51] Int. Cl.2 .............................................. C07C 49/44 

[52] U.S. CI . ................................................. 260/590 C 

[58] Field of Search ............ 260/590 C, 590 D, 590 R 

## [56] References Cited 

<img src='content_image/933599.jpg'>

Chatterjea et al., Indian J. Chem., vol. 11, pp. 214-218 (1973). 

Primary Examiner-James 0. Thomas, Jr. 

## U.S. PATENT DOCUMENTS 

## OTHER PUBLICATIONS 

Assistant Examiner-James H. Reamer 

Attorney, Agent, or Firm-Gaetano D. Maccarone; John P. Morley 

## [57] ABSTRACT 

A process for preparing a silver halide developing agent of the formula: 

<img src='content_image/933609.jpg'>

where R $^{1 }$can be the same or different substituent which will not impair the functionality of the compound as a silver halide developing agent. Specific substituents include hydrogen, alkyl radicals and alkoxy radicals among others. The silver halide developing agents are known as "ligand developers" and are particularly use› ful in diffusion transfer photographic products and pro› cesses. 

## 12 Claims, No Drawings 

# [11] 4,153,631 

# [45] May 8, 1979 

