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Base-promoted reaction of a hydrazonyl chloride with 1-phenylsulphonylpropyne |
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| Authors: | Luca Bruch ,Gaetano Zecchi |
| Affiliation: | Luca Bruché,Gaetano Zecchi |
| Abstract: | Treatment of methyl 2-chloro-2-phenylhydrazonoacetate (1) with 1-phenylsulphonylpropyne (3) in the presence of triethylamine gives pyrazole derivatives due to cycloadditions of a nitrile imine intermediate with 3 and with its rearranged product phenylsulphonylallene (4). |
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