摘要:
Aminoglykosidantibiotika der allgemeinen Formel wonn
R 1 , R 2 , R 3 , R. und R 5 unabhängig voneinander Wasserstoff oder einen Rest der Formel enthalten, wobei A für
R 6 für Wasserstoff, Triarylmethyl, Alkyl oder Acyl, oder 2 Reste R 6 gemeinsam Alkyliden, R 7 für Wasserstoff oder OR 6 , n 1 für 0, 1, 2 oder 3, n 2 für 0, 1, 2, 3, 4 oder 5 und n 3 , n. und n 5 unabhängig voneinander für 0, 1 oder 2 stehen, wobei die Summe aus n 1 , n 2 , n 3 und n 4 Werte von 1 bis 5 annimmt und die Gesamtzahl der OR 6 -Gruppen 2 bis 6 beträgt, und wenigstens einer der Reste R 1 , R 2 , R 3 , R 4 und R 5 nicht Wasserstoff ist, sind wirksamer und weniger toxisch als Aminoglykosidantibiotika, die diesen Rest nicht enthalten.
摘要:
The present invention relates to antimicrobial agents. Some embodiments include compounds, compositions, methods of preparation, and methods of treatment using new aminoglycosides and aminoglycoside derivatives.
摘要:
The invention provides 5-deoxy-5,5-difluoro derivatives of aminoglycoside antibiotics of neamine, kanamycin A, kanamycin B, gentamicin and seldomycin, each synthesized as a novel compound, and also 1-N-(α-hydroxy-φ-aminoalkanoyl) derivatives synthesized from the newly obtained 5-deoxy-5,5-difluorokanamycins A and B and analogs thereof. The 5-deoxy-5,5-difluoro derivatives thus obtained have antibacterial activities superior or substantially equivalent to those of the amino-glycoside antibiotics from which they are derived and further have a remarkably improved median lethal dose (LD50) when intravenously administered to mice and a remarkably reduced toxicity on mammals.
摘要:
Selon un procédé amélioré de conversion de gentamicine B en isépamicine, on prépare 3,6'-di-N-formylgentamicine B, on acyle le groupe 1-amine avec un composé de (S)-isosérine à N protégé et on élimine tous les groupes de blocage dans des conditions qui permettent d'obtenir des quantités élevées d'isépamicine. L'invention concerne également un nouvel agent formylant, le 2-formylmercaptobenzothiazole, et des composés intermédiaires.
摘要:
A high yielding process for converting 3,2',6'-tri-N-acetyl sisomicin to netilmicin comprising the step of silylating the starting material at the 5,2" positions, and optionally at the 4" position, converting the 1-amino substituents to a 1-N-imino substituent, converting the imino to an ethylamino, deprotecting the compound and recovering netilmicin. Also disclosed are novel intermediate compounds.
摘要:
Nouveaux glycosides guanyles de desoxystreptamine eventuellement substitues par un second radical d'hydrate de carbone et/ou par un radical acyle ou un amidino sur l'un des groupes amines, utiles comme antibiotiques a action antibacterienne.
摘要:
Disclosed are novel macrolide antibiotics of the general formula wherein R is H or OH; M is 0 or (H,OH); Z is the group of formula II, -CH 7 OH or groups which may be derived therefrom; A represents a double bond between carbon atoms of positions 12 and 13 or, together with the carbon atoms of positions 12 and 13, an oxirane ring. B represents a double bond between the carbon atoms of positions 10 and 11 or together with the carbon atoms of positions 10 and 11 the group -CH 2 -CH(O')-or-CH 2 -CH(O 2 )- and the non-toxic pharmaceutically acceptable ester and acid addition salts thereof. The novel antibiotic complex designated antibiotic AR-5 of the formula (falling within the scope of formula I), wherein R is hydrogen or hydroxy, and A represents a double bond or together with the carbon atoms of positions 12 and 13 an oxirane ring, can be produced by fermentation of a new species of the genus Micromonospora. which is Micromonospora Polytrota (e.g. NRR L 12066) The other compounds of formula I can be derived from the compounds of antibiotic AR-5 complex The compounds shown antibacterial activity. The gentamycine C complex is also produced by mic- r o monospora polytrota NRRL 12066