Chemistry of Diazopolycarbonyl Compounds: IX. Synthesis of 6-Aryl-3-acyl-4-hydroxypyridazines by Heterocyclization of 1,5-Disubstituted 2-Diazo-1,3,5-pentanetriones
作者:N. V. Kutkovaya、N. A. Pulina、V. V. Zalesov
DOI:10.1023/b:rujo.0000045200.31315.f1
日期:2004.7
5-Aryl-2-diazo-1,3,5-pentanetriones undergo intramolecular cyclization by the action of triphenylphosphine to give triphenylphosphine oxide and substituted 6-aryl-3-acyl-4-hydroxypyridazines.
Strategy for the Synthesis of Pyridazine Heterocycles and Their Derivatives
作者:Hassen Bel Abed、Oscar Mammoliti、Omprakash Bande、Guy Van Lommen、Piet Herdewijn
DOI:10.1021/jo400989q
日期:2013.8.16
The first synthesis of novel fused pyridazines has been realized starting from 1,3-diketones involving a Diaza–Wittig reaction as a key step. A convenient strategy was elaborated to access versatile pyridazinederivatives allowing the variation of substituents at position 6 of the heterocyclic ring. In a first part, pyridazines bearing an ester group were synthesized as a model to evaluate the methodology