Unexpected intramolecular cyclization of some 2′-aminochalcones to indolin-3-ones mediated by Amberlyst-15 |
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| Authors: | Rodrigo Abonia Paola Cuervo Braulio Insuasty Manuel Nogueras |
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| Affiliation: | a Departamento de Qu?´mica, Universidad del Valle, A.A. 25360, Cali, Colombia
b Departamento de Qu?´mica Inorgánica y Orgánica, Universidad de Jaén, 23071 Jaén, Spain |
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| Abstract: | The intramolecular cyclization of 2′-aminochalcones derived from 2- and 4-pyridinecarboxaldehydes was carried out in the presence of Amberlyst®-15/AcOH media. Unexpectedly, the reaction proceeded through a 5-exo process turning into an alternative approach for the synthesis of 2-(pyridinylmethylene)indolin-3-ones. |
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| Keywords: | 2&prime -Aminochalcones Amberlyst® -15 2-(Pyridinylmethylene)-3-indolinones |
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