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- W2000246187 abstract "Abstract Cycloaddition of diazomethane and ethyl diazoacetate to α-(diethoxyphosphoryl)vinyl p-tolyl sulfoxide 1a and its β-substituted analogues (Me, Ph) results in the formation of 3-phosphoryl-pyrazoles in high yield. The reaction ofchiral (S)-(+)-1a with diphenyldiazomethane proceeds fully diastereoselectively to give the corresponding cyclopropane (+)-6a with the (Sc, SS) configuration determined by X-ray diffraction analysis. Diazopropane reacts with (S)-(+)-1a to give only one diastereoisomer of the pyrazoline cycloadduct (+)-2e which undergoes decomposition to the cyclopropane (+)-6b with preservation of configurational integrity." @default.
- W2000246187 created "2016-06-24" @default.
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- W2000246187 date "2010-06-10" @default.
- W2000246187 modified "2023-09-26" @default.
- W2000246187 title "ChemInform Abstract: 1,3-Dipolar Cycloaddition of Diazoalkanes to Racemic and Optically Active α-(Diethoxyphosphoryl)vinyl p-Tolyl Sulfoxides: A New Synthesis of 3-Phosphorylpyrazoles and Asymmetric Synthesis of Cyclopropanes." @default.
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- W2000246187 doi "https://doi.org/10.1002/chin.200010153" @default.
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