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[3+2]-Cycloadditions of 2-Aminothioisomünchnones to Alkynes: Synthetic Scope and Mechanistic Insights
✍ Scribed by Marı́a J Arévalo; Martı́n Avalos; Reyes Babiano; Pedro Cintas; Michael B Hursthouse; José L Jiménez; Mark E Light; Ignacio López; Juan C Palacios
- Book ID
- 104202503
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- French
- Weight
- 245 KB
- Volume
- 56
- Category
- Article
- ISSN
- 0040-4020
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✦ Synopsis
This manuscript describes the regiospecific 1,3-dipolar cycloadditions of 2-aminothioisomu ¨nchnones (1-3) with methyl propiolate. The structure of compound 4 has been unequivocally determined by X-ray crystallography. Based on these experimental arguments and a theoretical rationale that supports the regiochemistry observed, a mechanistic pathway is discussed to account for the formation of pyridone or thiophene derivatives. The protocol has also been extended to the cycloadditions of aminothioisomu ¨nchnones derived from carbohydrates with dimethyl acetylenedicarboxylate to afford interesting glycosylaminoheterocycles.
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