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.
1-氨基-2,6,6-三氰基环己二烯衍生物1-3与各种芳基重氮盐偶联产生腙5-7,在乙醇中弱碱存在下,高温下提供2-芳基-4-氰基哒嗪-3 (2H) -一个 8-10。然而,在沸腾的甲苯中,正在形成互变异构腙11-13。