Solvent-Free Synthesis of 1,3-Diphenyl-5-arylpyrazole Derivatives
作者:Ji-Tai Li、Ying Yin、Xian-Tao Meng
DOI:10.2174/157017809788681383
日期:2009.7.1
The synthesis of 1,3-diphenyl-5-arylpyrazoles via the reactions of 2,3-epoxy-1-phenyl-3-aryl-1-propanones with phenylhydrazine was carried out in 48-84% yields at 230 °C under solvent-free condition within 1.5 h. This method provides several advantages such as operational simplicity, higher yield and solvent-free.
该方法通过 2,3-环氧-1-苯基-3-芳基-1-丙酮与苯肼的反应合成 1,3-二苯基-5-芳基吡唑,在 230 °C 无溶剂条件下 1.5 小时内产率达到 48-84%。
Visible light catalyzed aromatization of 1,3,5-triaryl-2-pyrazolines by platinum(II) polypyridyl complex under oxidant-free condition
With visible light (λ=450 nm) irradiation of a catalytic amount of platinum(II) terpyridyl complex, 1,3,5-triaryl-2-pyrazolines can be smoothly converted to their corresponding pyrazoles and hydrogen in quantitative yields with no use of any oxidant at room temperature.
Brönsted acid-mediated annulations of 1-cyanocyclopropane-1-carboxylates with arylhydrazines: efficient strategy for the synthesis of 1,3,5-trisubstituted pyrazoles
作者:Shuwen Xue、Jiaming Liu、Xushun Qing、Cunde Wang
DOI:10.1039/c6ra14557d
日期:——
A diversity-oriented synthesis of 1H-pyrazole derivatives via Brönsted acid-promoted annulations of 1-cyanocyclopropane-1-carboxylates with arylhydrazines has been developed.
A convenient and efficient protocol for the synthesis of 5-aryl-1,3-diphenylpyrazole catalyzed by hydrochloric acid under ultrasound irradiation
作者:Ji-Tai Li、Ying Yin、Ling Li、Ming-Xuan Sun
DOI:10.1016/j.ultsonch.2009.06.015
日期:2010.1
The synthesis of 5-aryl-1,3-diphenylpyrazole via the reactions of 3-aryl-2,3-epoxy-1-phenyl-1-propanone with phenylhydrazine was carried out in 69-99% yields at room temperature under ultrasound irradiation. This method provides several advantages such as operational simplicity, higher yield and environment friendly. (C) 2009 Elsevier B.V. All rights reserved.
Grimshaw, James; Silva, A. Prasanna de, Canadian Journal of Chemistry, 1980, vol. 58, p. 1880 - 1888