Abstract:
Diazabicycloamine derivs. of formula (I) and their salts are new. In (I), m = 1-3; n = 1-2; and R1, R2 = H or lower alkyl. Also claimed is the preparation of (I) which comprises e.g. reacting tetrakis(halomethyl)ethylene (halo = Cl, Br or I) with NH3 to form (I) in which m and n = 1 and R1 and R2 = H. (I) is e.g. 3,7-diazabicyclo(3.3.0)oct-1(5)ene or 3,8-diazabicyclo(4.3.0)non-1(6)-ene. Cpd. (I) is used for mfg. new quinolone antibiotics (claimed), with high antibacterial activity against Gram negative and Gram positive bacteria and improved antibacterial activity against methicillin resistant Staphylococcus aureus compared to ofloxacin, norfloxacin and ciprofloxacin. The quinolone are used for treating urethritis. (I) is also used for the prepn. of cephalosporins. cpds.
Abstract:
Quinolone derivs. of formula (I) and their acid addn. salts are new. In (I), X = C-H, C-F N; Z = H, halo or NH2; R1 = H or a cation; R2 = C1-4 (halo)hlkyl or hydroxyalkyl, or vinyl, C3-6 cycloalkyl or fluorophenyl; R3 = H, lower alkyl or formyl; m = 1- 3; n = 1 or 2. Also claimed is preparation of (I) which comprises e.g. condensing the corresponding quinolone derivative having a leaving gp. in the 7-position with a diazabicycloamine. (I) have improved and wider range of antibacterial activity against Gram positive and Gram negative bacteria than existing quinolone antibacterial agents, esp. norfloxacin, ciprofloxacin and ofloxacin. (I) have good antibacterial activity against methicillin resistant bacteria.
Abstract:
3-Pyrroline derivs. of formula (I) comprises (a) cyclization condensation reaction of ethyl-N-benzyl-N-(beta-carboxyethyl) glynate of formula (II) and sodium ethoxide to produce keto-form 1- benzyl-3-carboethoxy-4-pyrrolidone (IV), (b) reducing, acetylating (IV), and adding anhydrous potassium carbonate to produce 1-benzyl-3-carboethoxy-3-pyrroline (V), (c) selective reduction of ester gp. of (V) to hydroxy gp. to produce 1- benzyl-3-hydroxymethyl-3-pyrroline (III), and (d) removing the benzyl gp. of (III) with alkoxychloroformate and reacting the resulting cpd. with R1R2NH. (I) have antibacterial activity.
Abstract:
The invention provides 3-azabicyclo[3.1.3 heptane derivatives which are useful for preparation of novel quinolone and beta-lactam antibiotics and a process for producing said derivatives. These derivatives are represented by the formula (I) wherein; n is 0 or 1; each R1, R2 and R3 is hydrogen, low alkyly or amino protecting group such as benzyl and low alcoxycarbonyl; R4 is hydrogen, unsubstituted low alkyl group, or low alkyl group substituted by hydroxy, amino group, low alcoxy group, low alkylamino group or halogen.