Acylation of Sydnones with Acetic Anhydride in the Presence of Montmorillonite K-10 |
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| Authors: | Kenneth Turnbull Jones C. George |
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| Affiliation: | Department of Chemistry , Wright State University , Dayton, Ohio, 45435 |
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| Abstract: | Various 4-acetyl sydnones 2 can be prepared in good yield by reaction of the corresponding 3-arylsydnones (cf. 1) with acetic anhydride at ～ 110°C catalyzed by Montmorillonite K-10. The reaction fails where an ortho-keto moiety is present; therein sydnone ring cleavage occurs to form the corresponding indazole 3. |
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