2183-27-9Relevant articles and documents
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?
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.
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.
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
Synthesis of zirconia doped molybdenum oxide as efficient catalysts for ultrasound assisted synthesis of substituted pyrazoles
MUFTAH, AMAL A.,WAGHMODE, SHOBHA A.,GADALE, SHARDA R.
, p. 2007 - 2014 (2021/08/24)
To explore green methodology for the synthesis of mixed oxide, its catalytic activity and temperature stability of series of ZrO2/MoO3 and ZrO2 were prepared by sol-gel method and characterized by XRD, FT-IR, X-ray photoelectron spectroscopy (XPS), temperature programmed Desorption (TPD), Raman spectroscopy and transmission electron microscopes (TEM). These mixed oxides were showed high stability with nanocrystalline nature. Due to highly acidic nature of the catalysts, ultra sound assisted synthesis of substituted pyrazoles was carried out successfully with high yield. The reaction was carried out in solvent free medium, which showed green approach and energy saving reaction. Condensation of dibenzoyl methane and hydrazine to form substituted pyrazoles with 97.7% yield. The acid strength and acid amount of synthesized catalysts were determined by temperature programmed desoprtion (TPD), incorporation of zirconia into the molybdenum, network has changed its surface acid properties due to the Zr2+ and Mo6+ ions. After addition of ZrO2 on MoO3, it showed weak and strong acid sites.
PEROVSKITES FOR PHOTOCATALYTIC ORGANIC SYNTHESIS
-
, (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
