NEW MATERIAL:A compound of formula I(X1 is a nonmetallic atomic group necessary for forming a 5W6-membered aromatic ring; Y is a biWtrifunctional group capable of forming an electron attractive group of formula II; X2, X3 and X4 are H or monofunctional organic group; R1 is bifunctional organic group having one C in the linking chain; m1 and m2 are 1 or 2; at least one of a substitutent on the carbon atom in R1, substituent linked to the aromatic ring in X1 and X2, X3 and X4 has a group useful for the photography).
EXAMPLE: The compound of formula III.
USE: A compound, capable of releasing a diffusible photographically useful reagent, nondiffusible under alkaline conditions, and having the diffusibility under readucing conditions and releasing the photographically useful reagent.
PROCESS: A compound of formula IV is reacted with a compound of the formula X2COX5 (X5 is halogen, e.g. chlorine), etc. to give the compound of formula I. The compound of formula I in which X3 is a photographically useful group particularly has improved diffusibility of the photographically useful reagent, speeds up the processing on using for the diffusion transfer process and prevents the deterioration of the reagent and the constituent layer.
TAKAHASHI JIROU
KANBE MASARU
