4.4 Article

2-pyrazolines from 1,3 - Dipolar cycloaddition of diazomethane to arylsulfonylethenes

Journal

JOURNAL OF HETEROCYCLIC CHEMISTRY
Volume 40, Issue 5, Pages 933-937

Publisher

HETERO CORPORATION
DOI: 10.1002/jhet.5570400531

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Novel 2-pyrazolines were obtained by the cycloaddition of diazomethane to bis(arylsulfonylethenyl)sulfones (3) and 1-arylsulfonyl-2-styrylsulfonylethenes (7). Dehydrogenation of 2-pyrazolines with chloranil gave pyrazoles.

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