Sigma Complexes in the Pyrimidine Series. 6. Reaction of 5-Nitro-2-methoxy- and 5-Nitro-4,6-dimethoxypyrimidines with the Acetylacetone Carbanion

Article abstract of DOI:10.1007/BF00505768

Depending on the reaction conditions, the reaction of 5-nitro-2-methoxy- and 5-nitro-4,6-dimethoxypyrimidines with acetylacetone carbanion gives potassium salts of 5-nitrodiacetylmethylenepyrimidines or, as a result of recyclization of the pyrimidine ring, 5-nitro-2-hydroxyacetophenone.