Synthesis of the first examples of p-bromodienone and transannular spirodienone calixarene derivatives |
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| Authors: | Carmine GaetaMarco Martino Placido Neri |
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| Institution: | Dipartimento di Chimica, Università di Salerno, Via S. Allende 43, I-84081 Baronissi (Salerno), Italy |
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| Abstract: | The first examples of p-bromodienone calixarene derivatives (6-7 and 9-10) have been obtained by treatment of 1,5-dihydroxy-hexaalkoxycalix8]arenes 5 or tripropoxycalix4]arene 8 with trimethylphenylammonium tribromide and a saturated solution of NaHCO3. The first transannular spirodienone derivative 11 was only obtained in the presence of NaOH or using the KOH/I2/PEG-200 oxidizing system. |
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| Keywords: | calixarenes oxidation transannular spirodienone p-bromodienone |
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