abstract |
As a basic condensing agent for the preparation of 2-equivalent yellow couplers by reacting a-halogen-substituted a-acylacetamides with a phenol or an NH-acidic organic compound, non-alkylatable bicyclic nitrogen-containing bases, for. B. 1,5-diaza-bicyclo [4,3,0] non-5-ene or 1,8-diaza-bicyclo [5,4,0] undec-7-ene. |