摘要本研究旨在描述采用常规和超声辐照方法从合成中间体吡唑基/异恶唑基羧酸盐中简单,轻松地合成吡唑基/异恶唑基1,3,4-恶二唑衍生物的方法。实际上,与常规方法相比,超声促进的合成导致标题化合物的形成,产率更高,反应时间更短。所有化合物均通过IR,1 H NMR,13表征1 H NMR和质谱。评价合成的化合物的抗氧化和抗炎活性。生物测定结果表明,发现一些标题化合物比标准药物更有效。在所有测试的化合物中,呋喃基/吡啶基连接的吡唑基/异恶唑基甲氧基苯基磺酰基甲基恶二唑被鉴定为潜在的抗氧化剂和抗炎剂。 图形概要
Synthesis of 5-Substituted 3-Isoxazolecarboxylic Acid Hydrazides and Derivatives
作者:THOMAS S. GARDNER、E. WENIS、JOHN LEE
DOI:10.1021/jo01064a050
日期:1961.5
Synthesis of spiro-fused (C5)-pyrazolino-(C6)-triazinones, a new heterocyclic system
作者:Alexander V. Karpenko、Sergey I. Kovalenko、Oleg V. Shishkin
DOI:10.1016/j.tet.2009.05.091
日期:2009.8
Reaction of 4-hydrazinoquinazoline with 2,4-diketoesters gives the corresponding 3-acylmethyl-2H[1,2,4]triazino[2,3-c]quinazolin-2-ones in a one-step procedure via cyclocondensation-Dimroth-like rearrangement. Spectroscopic studies as well as X-ray analysis reveal that the obtained triazinoquinazolines exist in their ketoimine tautomeric form. Treatment of these compounds with hydrazine hydrate affords 3'-(2-aminophenyl)-3-(het)aryl-spiro[pyrazoline-5,6'(1'H)-1,2,4-triazin]-5'(4'H)-ones or 5-(het)arylpyrazole-3-carboxylic acid hydrazides depending on the reaction conditions. The structure of the spiro-heterocycles was elucidated by means of single-crystal X-ray analysis and confirmed by spectroscopic investigations. (C) 2009 Elsevier Ltd. All rights reserved.