Solvent-free sonochemical one-pot three-component synthesis of 2H-indazolo[2,1-b]phthalazine-1,6,11-triones and 1H-pyrazolo[1,2-b]phthalazine-5,10-diones
作者:Gaurav Shukla、Rajiv K. Verma、Girijesh K. Verma、Maya Shankar Singh
DOI:10.1016/j.tetlet.2011.10.136
日期:2011.12
A rapid and efficient one-potthree-component protocol for the synthesis of 2H-indazolo[2,1-b]phthalazine-1,6,11-triones 4 and 1H-pyrazolo[1,2-b]phthalazine-5,10-diones 6 has been developed by domino coupling of phthalhydrazide, 1,3-diketones, and aldehydes under solvent-free conditions at 80 °C as well as under solvent-free ultrasound irradiation at room temperature promoted by (S)-camphorsulfonic
一种快速高效的一锅三组分规程,用于合成2 H-吲唑并[2,1- b ]邻苯并-1,6,11-三酮4和1 H-吡唑并[1,2- b ]邻苯并-通过在80°C下无溶剂条件下以及(S)促进的室温下在无溶剂超声辐照下,将邻苯二甲酰肼,1,3-二酮和醛进行多米诺偶联,开发了5,10-二酮6。樟脑磺酸。
Dodecylphosphonic acid (DPA): a highly efficient catalyst for the synthesis of 2H-indazolo[2,1-b]phthalazine-triones under solvent-free conditions
for the synthesis of 2H-indazolo[2,1-b]phthalazine-triones via one-pot, three-component condensation reaction of aromatic aldehydes with 1,3-dicarbonyl compounds and phthalhydrazide using reusable dodecylphosphonic acid (DPA) as heterogeneous solid acid catalyst under solvent-free conditions. This protocol provides a novel and improved method for obtaining 2H-indazolo[2,1-b]phthalazine-triones in terms
已开发出一种新的绿色方案,用于使用可重复使用的十二烷基膦酸酯通过芳香醛与1,3-二羰基化合物和邻苯二甲酰肼的一锅三组分缩合反应来合成2 H-吲唑并[ 2,1 - b ]邻苯二甲酮三酮。在无溶剂条件下作为多相固体酸催化剂的酸(DPA)。该方案提供了一种新颖且改进的方法,该方法以良好的收率和很少的催化剂载量获得了2 H-吲哚并[ 2,1 - b ]邻苯二嗪-三酮。
TMSCl-mediated one-pot, three-component synthesis of 2<i>H</i>-indazolo[2,1-<i>b</i>]phthalazine-triones
A simple, efficient, and cost-effective method for the synthesis of 2H-indazolo[2,1-b]phthalazine-1,6,11(13H)-trione derivatives by a one-pot, three-component condensation reaction of phthalazide, dimedone, or 1,3-cyclohexanedione and aromatic aldehydes under CH3CN/DMF (8:2) media at 80°C for 30–60 min in the presence of trimethylsilyl chloride (TMSCl) is described. J. Heterocyclic Chem., (2009).
一种通过一锅三组分缩合反应合成2 H-吲哚并[ 2,1- b ]邻苯二甲酰1,6,11(13 H)-三酮衍生物的简单,高效且经济高效的方法酞嗪,双甲酮,或1,3-环己二酮和芳香醛在CH 3 CN / DMF(8:2)介质中在80°C下存在30-60分钟的条件下描述了三甲基甲硅烷基氯(TMSCl)。J.杂环化学,(2009)。
Application of O-sulfonic acid poly(4-vinylpyrrolidonium) chloride as an efficient polymer-supported catalyst in the rapid synthesis of 2H-indazolo[2,1-b]phthalazine-triones and Biginelli-like products
used as a catalyst for the synthesis of a series of 2H-indazolo[2,1-b]phthalazine-triones and Biginelli-like products. It was observed that only 10 mg of the catalyst was enough to catalyze these reactions undermildconditions, and the corresponding products were obtained in high to excellent yields. Moreover, the catalyst could be repeatedly used for at least five times without a noticeable decrease
Synthesis of 2 H- indazolo[2,1- b ]phthalazine-1,6,11(13 H )-triones using 1,4-disulfo-1,4-diazabicyclo[2.2.2]octane-1,4-diium dihydrogen sulfate {DABCO(HSO 3 ) 2 (HSO 4 ) 2 } as a new ionic liquid catalyst
1,4-Disulfo-1,4-diazabicyclo[2.2.2]octane-1,4-diium dihydrogen sulfate DABCO(HSO3)(2)(HSO4)(2)} as a new ionic liquid, is prepared and characterized by using different methods including FT-IR, NMR, Mass and SEM analysis as well as determination of the Hammett acidity function. This reagent can be used as an efficient catalyst for the promotion of the synthesis of 2H-indazolo[2,1-b]phthalazine-1,6,11(13H)-trione derivatives as important biologically active compounds with pharmaceutical properties. All reactions are performed in the absence of solvent using small amounts of the catalyst. Easy preparation of the catalyst, simple and easy work-up, mild reaction conditions, green process, excellent yields and short reaction times are the most important advantages this of method. (C) 2015 Elsevier Ltd. All rights reserved.