Derivatives of 3-bromo- and 3, 3-dibromo-4-oxo-1-azetidines,...

C - Chemistry – Metallurgy – 07 – D

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C07D 205/08 (2006.01) A61K 31/395 (2006.01) C07D 405/04 (2006.01)

Patent

CA 2196909

The invention relates to novel derivatives of 3-bromo- and 3,3-dibromo-4-oxo-1- azetidines, to processes for the preparation thereof and the use thereof. According to the invention derivatives of 3-bromo- and 3,3-dibromo-4-oxo-1- azetidines are prepared by the reaction of 2-sulfinic acid derivatives, preferably 2-substituted sulfinamides of 4-oxo-azetidines with various halogenating agents, and after the treatment of the reaction mixture, 2-halo derivatives of 3-bromo- and 3,3- dibromo-4-oxo-azetidines are isolated and are subjected to a reaction with silver tetrafluoroborate and alcohols to give the corresponding 2-alkoxy derivatives of3-bromo- and 3,3-dibromo-4-oxo azetidines, or 2-halo derivatives of 3-bromo- and3,3-dibromo-4-oxo azetidines are subjected to a reaction with silver nitrate in 2-propanol to give, after the treatment of the reaction mixture, 2-nitroxy derivatives of 3-bromo and 3,3-dibromo-4-oxo-1-azetidines. Some newly prepared compounds are deprotected and derivatives having a free carboxy group are obtained. The prepared compounds are components in pharmaceutical compositions effective in antibacterial or antitumour therapy.

Nouveaux dérivés de 3-bromo- et 3,3-dibromo-4-oxo-1-azétidines; méthodes de préparation et utilisations. Selon l'invention, les dérivés de 3-bromo- et 3,3-dibromo-4-oxo-1-azétidines sont préparés par réaction de dérivés de l'acide 2-sulfinique, de préférence des dérivés de substitution en 2 de sulfinamides de 4-oxo-azétidines, avec divers agents d'halogénation; après traitement du mélange réactionnel, les dérivés halogénés en 2 de 3-bromo- et 3,3-dibromo-4-oxo-azétidines sont isolés et soumis à une réaction avec du tétrafluoroborate d'argent et des alcools pour former les dérivés 2-alcoxylés correspondants de 3-bromo- et 3,3-dibromo-4-oxo- azétidines, ou les dérivés 2-halogénés de 3-bromo- et 3,3-dibromo-4-oxoazétidines sont soumis à une réaction avec du nitrate d'argent dans le 2-propanol pour former, après traitement du mélange réactionnel, des dérivés 2-nitroxy de 3-bromo et 3,3-dibromo-4-oxo-1-azétidines. Certains composés nouvellement préparés sont privés de protection et on obtient des groupes carboxy libres. Les composés préparés sont des constituants de compositions pharmaceutiques utiles comme agents antibactériens et antitumoraux.

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