An-Najah National University

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  • Wednesday, October 1, 1997
  • A new synthetic approach to indazole synthesis
  • Published at:SYNTHESIS-STUTTGART Issue: 10 Pages: 1140-& Published: OCT 1997
  • Stobbe condensation of 3-alkyl- or aryl-4-formylpyrazoles 3a-f with diethyl succinate in the presence of potassium t-butoxide, followed by intramolecular ring closure (Ac2O-NaOAc), afforded the corresponding indazole derivatives 5a-f in 65-85 % overall yield. These compounds are good starting materials for transformation to biologically active molecules, such as new pyrazole analogs of the left-hand segment of the potent natural antineoplastic agent CC-1065.

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Abdel-Naser Mohammad Tawfeeq Zaid
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