One-Pot Synthesis of Functionalized 3-Aryl-1-phenyl-1H-pyrazoles from Hydrazonoyl Chlorides and Acetylenic Esters in the Presence of Ph3P

[摘要]：The zwitterionic 1 : 1 intermediates generated by addition of Ph3P to acetylenic esters is trapped by 1-[(aryl)chloromethylene]-2-phenylhydrazines (=N-phenylarenecarbohydrazonoyl chlorides) to yield functionalized 3-aryl-1-phenyl-1H-pyrazoles in good yields.

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