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https://hdl.handle.net/10316/5137
Título: | Synthesis of tricyclic isoindoles and thiazolo[3,2-c][1,3]benzoxazines | Autor: | Pinho e Melo, Teresa M. V. D. Santos, Catarina I. A. Gonsalves, António M. d'A. Rocha Paixão, José A. Beja, Ana M. |
Palavras-chave: | Diastereoselectivity; Thiazolo[2,3-a]isoindoles; 3-Methylene-2,5-oxazolo[2,3-a]isoindoles; [1.3]Thiazolo[3,2-c][1,3]benzoxazines | Data: | 2004 | Citação: | Tetrahedron. 60:18 (2004) 3949-3955 | Resumo: | The thermolysis of (3R,9bS)-5-oxo-2,3,5,9b-tetrahydrothiazolo[2,3-a]isoindole-3-carboxylic acids in Ac2O led to novel 3-methylene-2,5-dioxo-3H,9bH-oxazolo[2,3-a]isoindoles and chiral (9bS)-5-oxo-2,3,5,9b-tetrahydrothiazolo[2,3-a]isoindoles were obtained on FVP. Starting from -cysteine methyl ester (3R,10bR)-5-oxo-2,3-dihydro-10bH-[1.3]thiazolo[3,2-c][1,3]benzoxazines were obtained as single stereoisomers. The thermolysis of (3R,10bR)-5-oxo-2,3-dihydro-10bH-[1.3]thiazolo[3,2-c][1,3]benzoxazine-3-carboxylic acid in Ac2O gave 5-acetyl-2-phenyl-2,3-dihydrothiazole. The structures of methyl (3R,9bS)-5-oxo-2,3,5,9b-tetrahydrothiazolo[2,3-a]isoindole-3-carboxylate 1a and methyl (2R,4R)-N-chlorocarbonyl-2-(2-hydroxyphenyl)thiazolidine-4-carboxylate 9 were determined by X-ray crystallography. | URI: | https://hdl.handle.net/10316/5137 | DOI: | 10.1016/j.tet.2004.03.030 | Direitos: | openAccess |
Aparece nas coleções: | FCTUC Química - Artigos em Revistas Internacionais |
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file3704f91d0f354061b2fedd7cab672a66.pdf | 217.25 kB | Adobe PDF | Ver/Abrir |
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