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Issue 37, 2013
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DABCO-promoted synthesis of pyrazoles from tosylhydrazones and nitroalkenes

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Abstract

An efficient synthesis of pyrazoles from tosylhydrazones and nitroalkenes was developed. In comparison with the previously reported 1,3-dipolar cycloaddition reaction of diazo compounds with electron-deficient alkenes or alkynes, this methodology proceeded with a sequential Baylis–Hillman/intramolecular cyclization mechanism and a variety of reversed regioselectivity products were prepared in good yields.

Graphical abstract: DABCO-promoted synthesis of pyrazoles from tosylhydrazones and nitroalkenes

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Publication details

The article was received on 12 Jul 2013, accepted on 30 Jul 2013 and first published on 01 Aug 2013


Article type: Communication
DOI: 10.1039/C3OB41435C
Org. Biomol. Chem., 2013,11, 6250-6254

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    DABCO-promoted synthesis of pyrazoles from tosylhydrazones and nitroalkenes

    M. Tang, W. Zhang and Y. Kong, Org. Biomol. Chem., 2013, 11, 6250
    DOI: 10.1039/C3OB41435C

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