Abstract
A novel one-pot synthesis of 1,3,4-trisubstituted pyrazoles has been accomplished by 1,3-dipolar cycloaddition of α,β-unsaturated ketones and 3-arylsydnones in dry xylene. The structural identities of these compounds were confirmed on the basis of IR, NMR, mass spectral, and X-ray analysis.
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We are grateful to the Key SCI-Tech Innovation Team of Zhejiang Province (2010R5 0017) for financial help.
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Chen, F., Liu, FM., Shi, H. et al. A facile access to 1,3,4-trisubstituted pyrazoles via 1,3-dipolar cycloaddition of 3-arylsydnones with α,β-unsaturated ketones. Monatsh Chem 144, 879–884 (2013). https://doi.org/10.1007/s00706-012-0901-7
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DOI: https://doi.org/10.1007/s00706-012-0901-7