Abstract:
PURPOSE: Provided is a heterodimer of neomycin and chloramphenicol with improved specificity to a target RNA molecule to increase the medicinal efficacy while decreasing adverse effects due to the non-specific drugs. It is effectively used as an anti-virus agent, an anti-bacteria agent, or an anti-cancer agent. CONSTITUTION: A heterodimer(formula 1) of neomycin and chloramphenicol is structured such that the heterodimer is specific-coupled to 16S rRNA, RRE RNA, or TS RNA. In the formula(1), n is an integer of 2-10 and, more particularly, 3, 6 or 9. The specific coupling of the heterodimer to the RNA is characterized by simultaneously recognizing the stem and the loop of the RNA. The specific coupling is intrinsic to the sequence of RNA.
Abstract:
본 발명은 항균제로 유용한 신규의 1-베타메틸카바페넴 유도체, 그를 포함하는 약학적 조성물 및 그의 제조방법에 관한 것으로서, 구체적으로 화학식 1로 표시되는 카바페넴 모핵의 2번 위치에 주요 관능기로서 5-(2'-이소옥사졸릴에텐닐)피롤리딘-3-티오기 또는 5-(2'-이소티아졸릴에텐닐)피롤리딘-3-티오기가 치환된 1-베타메틸카바페넴 유도체, 그를 포함하는 약학적 조성물 및 그의 제조방법에 관한 것이며, 본 발명에 의한 1-베타메틸카바페넴 유도체는 디하이드로펩티다제-I에 대해 안정하고 그람양성균 및 그람음성균 모두에 대해 우수한 항균 활성을 보이는 유용한 항균제이다.
Abstract:
PURPOSE: Provided is a novel 1-β- methylcarbapenem derivative which has an antibacterial effect on both gram negative and positive bacteria and stability to dihydropeptidase-I, and is thus useful as antibacterial agent. And a pharmaceutical composition containing it and its manufacturing method are also provided. CONSTITUTION: The novel 1-β- methylcarbapenem derivative is represented by the formula(I), wherein R is described as in the description, X is ethoxycarbonyl group or hydroxymethyl group; Y is hydroxymethyl group or ethoxycarbonyl group; and Z is methyl group or carbamoylmethyl group. Its manufacturing method comprises the steps of: reacting enolphosphate with thiol derivative in the presence of base, in appropriate solvent to prepare protected carbapenem derivative; and deprotecting the protected carbapenem derivative to obtain 1-β- methylcarbapenem derivative.
Abstract:
The oxazolinon type derivative represented by the following general formula(I) and its preparing method is disclosed with uses as herbicides wherein, R is low alkyl or halogen, low alkyl or trifluoromethyl containing phenyl, X is the same or different, halogen, carbomethoxy, nitro, or halogen, trifluoro substituted phenoxy, A is nitrogen, carbon, n is an integer of 1-3. The oxazolinon type derivative is prepared by a condensation reaction of M-amino acid of the general formula(II) and an acid chloride of the general formula(III) to produce an amino substituted M-amino acid of the general formula(IV), and then dehydration reaction after subjecting to reacting with anhydride nitric acid. The herbicide according to this invention has excellent herbicidal effectiveness in treatment of pre- or postemergency against a dicotyledonous plant.