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Title: Intermolecular Dipolar Cycloaddition Reactions of 5H,7H-Thiazolo[3,4-c]oxazol-4-ium-1-olates
Authors: Melo, Teresa M. V. D. Pinho e 
Soares, Maria I. L. 
Barbosa, Dália M. 
Gonsalves, António M. d'A. Rocha 
Beja, Ana Matos 
Paixão, José A. 
Silva, Manuela Ramos 
Veiga, Luiz Alte da 
Issue Date: 2000
Citation: Tetrahedron. 56:21 (2000) 3419-3424
Abstract: (5R)-3-Methyl-5-phenyl-5H,7H-thiazolo[3,4-c]oxazol-4-ium-1-olate was generated in the presence of a range of dipolarophiles. The intermolecular 1,3-dipolar cycloaddition of this mesoionic species led to the synthesis of chiral 1H-pyrrolo[1,2-c]thiazole derivatives 7a, 7b, 8, 14, 18, 19 and 20. In the reaction with methyl and ethyl vinyl ketone, spiro compounds 9 and 15 were also obtained. The structure of compound 15 was determined by X-ray crystallography.
DOI: 10.1016/S0040-4020(00)00243-X
Rights: openAccess
Appears in Collections:FCTUC Química - Artigos em Revistas Internacionais

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