Flash vacuum pyrolysis of pyrazoles as an alternative way to study vinylcarbenes

EL Moyano, GI Yranzo, J Elguero

Index: Moyano, Elizabeth L.; Yranzo, Gloria I.; Elguero, Jose Journal of Organic Chemistry, 1998 , vol. 63, # 23 p. 8188 - 8191

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Citation Number: 16

Abstract

Flash vacuum pyrolysis (FVP) reactions of 3, 5-diphenylpyrazole (1) and 3 (5)-methyl-5 (3)- phenylpyrazole (2) were carried out. The reaction products expected for nitrogen extrusion were formed through different rearrangements in the vinylcarbene intermediate. Kinetic parameters for nitrogen extrusion from 1 are reported. To show that FVP reactions of pyrazoles are useful to obtain vinylcarbenes, the reactions of other pyrazoles previously ...