United States  Patent  [19]  Bader et  al.  [11]  4,153,631  [45]  May 8, 1979  [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  U.S.  PATENT DOCUMENTS  3,629,336  3,772,368  3,812,191  3,903,169  12/1971  11/1973  5/1974  9/1975  Idelson  .............................  260/590 C  Bader et al. ......................  260/590 C  Bader et al. ......................  260/590 C  Bader et al. ......................  260/590 C  OTHER PUBLICATIONS  Chatterjea  et al., Indian  J.  Chem., vol. 11,  pp. 214-218  (1973).  Primary  Examiner-James  0. Thomas, Jr.  Assistant  Examiner-James  H.  Reamer  Attorney, Agent,  or  Firm-Gaetano  D.  Maccarone; John  P.  Morley  A  process for preparing  a silver halide  developing agent  of the formula:  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.  [57]  ABSTRACT  12 Claims, No Drawings  OH  0  ◊ .  W  II  CR1-CR1-C~  RI  ~  OH 