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Synlett 1999; 1999(3): 299-302
DOI: 10.1055/s-1999-2608
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β-Tosylhydrazono Phosphonates in Organic Synthesis. An Unambiguous Entry to Polysubstituted Pyrazoles

N. Almirante* , A. Benicchio, A. Cerri, G. Fedrizzi, G. Marazzi, M. Santagostino
  • *Prassis Istituto di Ricerche Sigma-Tau, Via Forlanini 3, 20019 Settimo Milanese, (MI), Italy; Fax +39 (02 33) 50 03 88; E-mail: pstchem@tin.it
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Publikationsdatum:
31. Dezember 1999 (online)

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β-Tosylhydrazono phosphonates are novel, bifunctional reagents which were used for a concise approach to a wide range of polysubstituted pyrazoles in a single operation from aromatic and aliphatic aldehydes.

β-tosylhydrazono phosphonate - aldehyde - α,β-unsaturated tosylhydrazone - pyrazole