Syntheses with Unsaturated Nitriles, IX: 3(2H)-Pyridazinones from Alkylidenemalononitrile Dimers
作者:Maria J. Mokrosz
DOI:10.1002/ardp.19933260109
日期:——
The coupling of 1‐amino‐2,6,6‐tricyanocyclohexadiene derivatives 1‐3 with a variety of aryldiazonium salts produces the hydrazones 5‐7 which in the presence of weak base in ethanol at elevated temperature furnish 2‐aryl‐4‐cyanopyridazin‐3(2H)‐ones 8‐10. In boiling toluene, however, the tautomeric hydrazones 11‐13 are being formed.