Synthesis and Testing of New Heterocyclic Photographic Developing Agents

摘要

The material contained in this report is a detailed summary of work carried out between 1 October 1955 and 31 December 1956 on the synthesis and photographic testing of various heterocyclic compounds which were regarded as potential develop¬ing agents.nA survey of the patent literature for the years 1937 to 1955 was conducted to determine the areas in which work had already been done. Following this, suitably substituted heterocyclic compounds, obtained by purchase or by synthesis, were tested as photographic developers. A detailed description of the synthetic procedures used is included in this report as well as all data obtained in the photographic testing program.nSeveral heterocyclic compounds containing or capable of reacting to form the structure thought to be responsible for good developing action were found to be photo¬graphically active. The only heterocyclic compound showing practical developing activity was 2, 3, 6-triaminopyridine. Extensive testing of this compound indicated that it was at least as active as hydroquinone. A patent application covering this com¬pound will be filed.nA short summary of the sensitometric data concerning 2, 3, 6-triaminopyridine (TAP) is included in this abstract.