1235582-03-2Relevant articles and documents
Pyrano[4,3-d]pyrimidinium salts Transformations of 5, 7-diaryl-1, 3-dimethyl-2, 4-dioxo-1/7, 3/7-pyrano[4, 3-d]pyrimidinium bromides under the action of phenylhydrazines and aromatic acid hydrazides
Kostrub,Tsupak,Smol’yakov
, p. 1469 - 1475 (2009)
Reactions of 5, 7-diaryl-1, 3-dimethyl-2, 4-dioxo-15, 35-pyrano[4, 3-d]pyrimidinium bromides with phenylhydrazines and aromatic acid hydrazides have been studied. The reaction of the salts indicated with phenylhydrazine at ~20 °C results in the pyrylium r