Abstract:
PURPOSE: A COD(chemical oxygen demand) reducing technology for leachate from a reclamation site using biological treatment is provided to greatly reduce COD by using bacteria producing lignin decomposition and/or oxidation enzyme. CONSTITUTION: Using bacteria having lignin decomposing enzyme or oxidizing enzyme like monoxidase or dioxidase, lignin and cyclic compounds containing halogen, which are hardly decomposed under normal condition, are easily decomposed to reduce COD. The treated bacteria grow well without adding no nutrient in the leachate. Intake and decomposition by the bacteria reduce COD value and lower nutrients in the leachate.
Abstract:
PURPOSE: Provided are novel 1-β-methylcarbapenem derivatives substituted by pyrrolidine containing imidazoline ring which are strong antibiotics against resistant bacteria. CONSTITUTION: The compound is represented by chemical formula 1, where R is C1-6 low alkyl, aryl and benzyl group which are substituted by one or more groups from hydrogen, hydroxy, amine, sulfonyl and aminosulfonyl group. The process of preparing the compound consists of: converting diazoazetidione compound, chemical formula 2, to two ring keto ester under rhodium acetate catalyst and reacting at 0-5deg.C with diphenylchlorophosphate under base such as diisopropylethylamine; reacting the resultant with thiol derivative of chemical formula 3, and eliminating allyl group from the product by reacting with tributyltinhydride under tetrakisphosphine palladium(0) catalyst at room temp. for 2 hours. After reactions, distilled water is added to extract the water layer and it is freeze dried to get the final compound.
Abstract:
PURPOSE: The benzamide compounds and a producing method thereof are provided, thereby the benzamide compounds can label technesium which is a radioisotope and F-18 with no having disadvantages of prior arts. CONSTITUTION: The benzamide compounds are represented by formula (1), in which R is methanesulfonyl, paratoluenesulfonyl or trifluoromethanesulfonyl. The compound of formula (1a) is produced by dissolving the compound of formula (7) in sulfonyl chloride, neutralizing the solution with sodium sulfate, and removing the solvent to produce the compound of formula (8); dissolving the compound of formula (8) in toluene, dropping thionyl chloride to the solution, removing the solvent by distilling under reduced pressure, dissolving it in organic solvent, and reacting the solution with the compound of formula (6) to produce the compound of formula (9); dissolving the compound of formula (9) in organic solvent and reacting the solution with boron tribromide to produce the compound of formula (10); and dissolving the compound of formula (10) in organic solvent and reacting the solution with methanesulfonyl chloride.
Abstract:
PURPOSE: 1-beta-methyl-2-thiol carageen derivatives having thiol derivatives in 2-position are prepared which has a stability for DHP-1 enzyme. CONSTITUTION: Trans-L-hydroxyproline and potassium cyanate are dehydrogenated to give cyclized 7-hydroxy-1,3-diazabicyclo(3.3.0)octan-2,4-dione, followed by alkylation with alkyl halide and calcium carbonate, and treated with methyl sulfonyl chloride in the presence of triethyl amine to give a compound(formula 3). Obtained compound(3) is treated with potassium thioacetate and hydrolyzed by 4N-NaOH to give thiol derivatives(formula 1; R is lower allyl containing hydrogen, methyl, ethyl, propyl, butyl, and alkyl group containing hydroxy group such as benzyl, ethyl alcohol etc. 1-beta-methyl-2-thiol carageen derivatives(formula 2) are prepared from the thiol derivatives.