ENCHAINEMENTS HETEROATOMIQUES ET LEURS PRODUITS DE CYCLISATION‒IX1 ALKOXYCARBONYL-5 6H-THIAZINES-1,3, INTERMEDIAIRES D'UNE NOUVELLE SYNTHESE DE CEPHEMES
5-Alkoxycarbonyl-6H-1,3-thiazines, precursors of cephems, are prepared by alkylation of 2-methylene-3, 6-dihydro-2H-1,3-thiazines or by conversion of the carbaldehyde substituted at the 5 position of a 6H-1,3-thiazine. These compounds give access to dihydrothiazinic acids converted into cephems in t...
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| Veröffentlicht in: | Phosphorus and sulfur and the related elements 1987-08, Vol.32 (3-4), p.153-161 |
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| container_issue | 3-4 |
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| container_title | Phosphorus and sulfur and the related elements |
| container_volume | 32 |
| creator | Reliquet, A. Reliquet, F. Meslin, J. C. Sharrard, F. Quiniou, H. |
| description | 5-Alkoxycarbonyl-6H-1,3-thiazines, precursors of cephems, are prepared by alkylation of 2-methylene-3, 6-dihydro-2H-1,3-thiazines or by conversion of the carbaldehyde substituted at the 5 position of a 6H-1,3-thiazine. These compounds give access to dihydrothiazinic acids converted into cephems in the presence of methanesulfonyl chloride in anhydrous chloroform.
Les alkoxycarbonyl-5 6H-thiazines-1,3 précurseurs de céphèmes sont obtenues par alkylation de méthylène-2 2H-dihydro-3,6 thiazines-1,3 ou par conversion de la fonction carbaldéhyde d'une formyl-5 thiazine. Ces composés conduisent en deux étapes aux acides dihydrothiaziniques qui sont transformés en céphèmes par le chlorure de méthanesulfonyle en milieu anhydre. |
| doi_str_mv | 10.1080/03086648708074272 |
| format | Article |
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Les alkoxycarbonyl-5 6H-thiazines-1,3 précurseurs de céphèmes sont obtenues par alkylation de méthylène-2 2H-dihydro-3,6 thiazines-1,3 ou par conversion de la fonction carbaldéhyde d'une formyl-5 thiazine. Ces composés conduisent en deux étapes aux acides dihydrothiaziniques qui sont transformés en céphèmes par le chlorure de méthanesulfonyle en milieu anhydre.</abstract><pub>Taylor & Francis Group</pub><doi>10.1080/03086648708074272</doi><tpages>9</tpages></addata></record> |
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| title | ENCHAINEMENTS HETEROATOMIQUES ET LEURS PRODUITS DE CYCLISATION‒IX1 ALKOXYCARBONYL-5 6H-THIAZINES-1,3, INTERMEDIAIRES D'UNE NOUVELLE SYNTHESE DE CEPHEMES |
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