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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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Article information


Submitted
12 Jul 2013
Accepted
30 Jul 2013
First published
01 Aug 2013

Org. Biomol. Chem., 2013,11, 6250-6254
Article type
Communication

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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