DERIVATIVES OF 1-(2-PYRIDYL)-4,5,6,7-TETRAHYDROINDAZOLE

Article abstract of DOI:10.1007/BF01373547

In reactions of oxidation of 1-(2-pyridyl)-3,6,6-trimethyl-4-oxo-4,5,6,7-tetrahydroindazole, the corresponding 4,5-dioxoindazole is obtained, and then 1-(2-pyridyl)-3-methyl-4-carboxy-5-(2-methyl-2-carboxypropyl)pyrazole; in bromination reactions, a series of 5-bromo and 7-bromo derivatives is obtained.From 4,5-dioxoindazole with hydrazides of acids, a series of 4-oxo-5-acylhydrazono derivatives is obtained, and also 1-(2-pyridyl)-3,6,6-trimethyl-4-oxo-5-tosylhydrazono-4,5,6,7-tetrahydroindazole, which, under the action of caustic, gives the 4-oxo-5-diazo derivative.