Agfa-gevaert Ag

Siegfried Schleger

Ernst Meier

Wolfgang Lassig

Karl-Wilhelm Schranz

Erwin Ranz

Hans-Heinrich Credner

Hans Heinrich Credner

Fritz Benker

5- or 6-membered .alpha.-lactones of phenolic compounds, in which the phenyl ring carries a hydroxyl or amino group in its 2- or 4-position to the lactonized phenolic hydroxyl group and in which the lactone ring carries an electron accepting substituent, so that the lactone ring is readily cleavable at pH values of from 10 to 13 to form an electron donor compound (ED-compound) having a redox potential of less than +0.255 V determined against a normal calomel electrode at pH 0 are useful ED precursor compounds for non-diffusing reducible color providing compounds.

Color photographic recording material containing non-diffusing electron

The condensation of an .alpha.-halogen carbonyl compound with carbamic acid esters in the presence of a basic condensing agent and an aprotic solvent enables the production of oxazolinone-2-compounds in a high degree of purity, and in high yields in one step by using simple and readily available starting compounds.

Process for the production of oxazolinone-2-compounds

Oxazolinone-2 derivatives having a releasable mercapto group in their 5-position are provided as development-inhibitor-releasing thioether compounds for use in color photographic material having a high reactivity on chromogenic development of color photographic material, and are very easy to prepare.

Light-sensitive photographic material

Growing community of inventors

Munich, Germany

Siegfried Schleger