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Issue 19, 1995
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Rationale for predominance of 1,3-dipolar cycloreversion in thermolysis of 3,4-dihydropyrazole from ethano-bridged diphenyldiazomethane and 2,5-dimethyl-1,4-benzoquinone. An X-ray study

Abstract

The X-ray crystal structure of the title dihydropyrazole indicates that the steric and π-conjugative effects associated with the conformational locking of the two phenyl rings are the crucial factors in the predominance of 1,3-dipolar cycloreversion rather than nitrogen extrusion to give the cyclopropane derivative.

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Article type: Paper
DOI: 10.1039/C39950001937
J. Chem. Soc., Chem. Commun., 1995, 1937-1938

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    Rationale for predominance of 1,3-dipolar cycloreversion in thermolysis of 3,4-dihydropyrazole from ethano-bridged diphenyldiazomethane and 2,5-dimethyl-1,4-benzoquinone. An X-ray study

    T. Oshima, T. Kawamoto, H. Kuma, Y. Kushi and T. Nagai, J. Chem. Soc., Chem. Commun., 1995, 1937
    DOI: 10.1039/C39950001937

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