2183-27-9Relevant academic research and scientific papers
Oxone?-promoted one-pot synthesis of 1-aryl-4-(organylselanyl)-1H-pyrazoles
Jacob, Raquel G.,De Oliveira, Daniela H.,Peglow, Thiago J.,Nascimento, José E. R.,Bartz, Ricardo H.
, p. 2144 - 2152 (2019)
We describe herein an efficient protocol for the one-pot synthesis of 4-organylselanylpyrazoles by direct cyclocondensation and C-H bond selenylation reactions starting from hydrazines, 1,3-diketones and diorganyl diselenides promoted by Oxone?
Microwave-assisted aromatization of 1,3,5-trisubstituted 2-pyrazolines by silica-supported N-bromosuccinimide as a useful reagent under solvent free 'dry' condition
Azarifar, Davood,Maleki, Behrooz
, p. 865 - 870 (2005)
An efficient aromatization of 1,3,5-trisubstituted 2-pyrazolines to theircorresponding pyrazoles by NBS was carried out under microwave irradiation and solvent-free conditions in moderate yields. It has also been observed that, by activating the NBS reage
N,N′,N,N′-tetrabromo-benzene-1,3-disulfonylamide as a novel reagent for oxidative aromatization of 1,3,5-trisubstituted pyrazolines under heterogeneous and solvent-free conditions
Ghorbani-Vaghei, Ramin,Azarifar, Davood,Khazaei, Ardeshir,Maleki, Behrooz
, p. 1877 - 1881 (2004)
1,3,5-Trisubstituted pyrazolines were converted to the corresponding pyrazoles in good yields under heterogeneous and solvent-free conditions by N,N′,N,N′-tetrabromo-benzene-1,3-disulfonylamide [TBBDA] at ambient temperature.
Mild oxidation of 1,3,5-trisubstituted pyrazolines with N-bromo-sulphonamides
Ghorbani-Vaghei, Ramin,Azarifar, Davood,Maleki, Behrooz
, p. 1373 - 1376 (2004)
1,3,5-Trisubstituted pyrazolines to pyrazoles are carried out efficiently in the presence of new reagents N,N,N′,N′-tetrabromo-benzene-1,3- disulfonylamine [TBBDA] and N,N′-dibromo-N,N′-1,2-ethanediylbis-(p- toluenesulphonamide) [BNBTS] in solvent-free conditions with catalytic amounts of SiO2 under microwave irradiation in high yields.
Trichloroisocyanuric acid as a novel oxidizing agent for the oxidation of 1,3,5-trisubstituted pyrazolines under both heterogeneous and solvent free conditions
Zolfigol, Mohammad Ali,Azarifar, Davood,Maleki, Behrooz
, p. 2181 - 2183 (2004)
Trichloroisocyanuric acid is used as an effective oxidizing agent for the oxidation of 1,3,5-trisubstituted pyrazolines to their corresponding pyrazoles under both heterogeneous and also solvent free conditions with good yields at room temperature.
4-(p-Chloro)phenyl-1,2,4-triazole-3,5-dione as a novel and reusable reagent for the oxidation of 1,3,5-trisubstituted pyrazolines under mild conditions
Zolfigol, Mohammad Ali,Azarifar, Davood,Mallakpour, Shadpour,Mohammadpoor-Baltork, Iraj,Forghaniha, Ali,Maleki, Behrooz,Abdollahi-Alibeik, Mohammad
, p. 833 - 836 (2006)
4-(p-Chloro)phenyl-1,3,4-triazole-3,5-dione is used as an effective oxidizing agent for the oxidation of 1,3,5-trisubstituted pyrazolines to their corresponding pyrazoles under mild conditions with moderate to good yields at room temperature.
Silica-supported 1,3-dibromo-5,5-dimethylhydantoin (DBH) as a useful reagent for microwave-assisted aromatization of 1,3,5-trisubstituted pyrazolines under solvent-free conditions
Azarifar, Davood,Zolfigol, Mohammad Ali,Maleki, Behrooz
, p. 1744 - 1746 (2004)
1,3,5-Trisubstituted pyrazolines are rapidly and conveniently oxidized to their corresponding pyrazoles by 1,3-dibromo-5,5-dimethylhydantoin (DBH) under microwave irradiation and solvent-free conditions. The presence of silica gel as a supporting agent is
Synthesis of 1: H -indazoles by an electrochemical radical Csp2-H/N-H cyclization of arylhydrazones
Alhumade, Hesham,Lei, Aiwen,Li, Dongting,Wan, Hao,Xia, Huadan,Yang, Liwen,Yi, Hong
, p. 665 - 668 (2022/01/22)
The development of efficient and sustainable C-N bond-forming reactions to N-heterocyclic frameworks has been a long-standing interest in organic synthesis. In this work, we develop an electrochemical radical Csp2-H/N-H cyclization of arylhydrazones to 1H-indazoles. The electrochemical anodic oxidation approach was adopted to synthesize a variety of 1H-indazole derivatives in moderate to good yields. HFIP was not only employed as a solvent or the proton donor, but also can promote the formation of N free radicals. This synthetic methodology is operationally simple, and less expensive electrodes would be suitable for this chemistry. This journal is
TBHP/Cu(OAc)2 mediated oxidation of pyrazolines: A convenient method for the preparation of pyrazoles
Kolla, Sai Teja,Somanaboina, Ramya,Bhimapaka, China Raju
, p. 1425 - 1432 (2021/02/27)
An efficient and simple oxidative protocol has been developed for the preparation of pyrazoles from pyrazolines mediated by TBHP/Cu(OAc)2 at room temperature. The present protocol has been successfully applied for the preparation of various pyrazole compounds from heterocyclic pyrazolines.
PEROVSKITES FOR PHOTOCATALYTIC ORGANIC SYNTHESIS
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, (2022/01/07)
Nature is capable of storing solar energy in chemical bonds via photosynthesis through a series of C—C, C—O and C—N bond-forming reactions starting from CO2 and light. Direct capture of solar energy for organic synthesis is a promising approach
