Formal [4 + 1] Annulation of α-Arylhydrazonoketones and Dimethylsulfoxonium Methylide: One-pot Synthesis of Substituted Pyrazoles and Dihydropyrazoles

2016 ◽  
Vol 81 (14) ◽  
pp. 6036-6041 ◽  
Author(s):  
Qian Zhang ◽  
Mangfei Yu ◽  
Jingwen Yuan ◽  
Rui Zhang ◽  
Yongjiu Liang ◽  
...  
Keyword(s):  
One Pot ◽  
One Pot Synthesis ◽  
Dimethylsulfoxonium Methylide ◽  
Substituted Pyrazoles

Alginate–copper microspheres as efficient and reusable heterogeneous catalysts for the one-pot synthesis of 4-organylselanyl-1H-pyrazoles

2020 ◽  
Vol 10 (12) ◽  
pp. 3918-3930 ◽  
Author(s):  
Jaqueline F. Souza ◽  
Thalita F. B. de Aquino ◽  
José E. R. Nascimento ◽  
Raquel G. Jacob ◽  
André R. Fajardo
Keyword(s):  
Heterogeneous Catalysts ◽  
One Pot ◽  
New Class ◽  
One Pot Synthesis ◽  
Facile Preparation ◽  
The One ◽  
Substituted Pyrazoles

This study demonstrates the facile preparation and use of alginate–Cu2+ microspheres in the catalysis of a new class of organoselenium substituted pyrazoles through one-pot reactions.

Molybdenum-Mediated One-Pot Synthesis of Pyrazoles from Isoxazoles

Synthesis ◽  
2019 ◽  
Vol 51 (20) ◽  
pp. 3796-3804 ◽  
Author(s):  
Marine Rey ◽  
Stéphane Beaumont
Keyword(s):  
Bond Cleavage ◽  
Direct Synthesis ◽  
Molybdenum Complex ◽  
One Pot ◽  
One Pot Synthesis ◽  
Wide Range ◽  
Hydrolysis Of ◽  
Substituted Pyrazoles

A one-pot approach for the direct synthesis of substituted pyrazoles from isoxazoles is reported. The process involves isoxazole N–O bond cleavage mediated by a molybdenum complex, in situ hydrolysis of the resulting β-amino enone to the corresponding 1,3-diketone, followed by pyrazole formation in the presence of hydrazine or substituted hydrazine. Good to excellent yields and regioselectivities are obtained with nonsymmetric isoxazoles. By using readily available starting materials, a wide range of substituted pyrazoles may be synthesized by this method.

ChemInform Abstract: Silica Chloride Catalyzed One-Pot Synthesis of Fully Substituted Pyrazoles.

ChemInform ◽  
2012 ◽  
Vol 43 (6) ◽  
pp. no-no
Author(s):  
Dhanaji V. Jawale ◽  
Umesh R. Pratap ◽  
Jyotirling R. Mali ◽  
Ramrao A. Mane
Keyword(s):  
One Pot ◽  
One Pot Synthesis ◽  
Substituted Pyrazoles

ChemInform Abstract: One-Pot Synthesis of 4-(Phenylselanyl)-Substituted Pyrazoles.

ChemInform ◽  
2016 ◽  
Vol 47 (27) ◽  
Author(s):  
Metin Zora ◽  
Deniz Demirci ◽  
Arif Kivrak ◽  
Yilmaz Kelgokmen
Keyword(s):  
One Pot ◽  
One Pot Synthesis ◽  
Substituted Pyrazoles

Silica chloride catalyzed one-pot synthesis of fully substituted pyrazoles

2011 ◽  
Author(s):  
Dhanaji V. Jawale ◽  
Umesh R. Pratap ◽  
Jyotirling R. Mali ◽  
Ramrao A. Mane
Keyword(s):  
One Pot ◽  
One Pot Synthesis ◽  
Substituted Pyrazoles

One-Pot Synthesis of 4-Heteroaryl-Substituted Pyrazoles: A Gold-Catalyzed Oxidation/1,2-Heteroaryl Migration Cascade Constitutes the Key Step

2016 ◽  
Vol 358 (9) ◽  
pp. 1534-1539 ◽  
Author(s):  
Xinbo Yao ◽  
Tao Wang ◽  
Xi Zhang ◽  
Ping Wang ◽  
Bing Zhang ◽  
...  
Keyword(s):  
One Pot ◽  
One Pot Synthesis ◽  
Catalyzed Oxidation ◽  
Substituted Pyrazoles
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