摘要:
The present invention discloses a probe useful for the selective detection of metallo-beta-lactamases, in particular carbapenemases, thereby distinguishing those species of bacteria that are carbapenem-resistant from bacterial strains that are sensitive. Cephalospori based probes that have the 6,7 R,R configuration are susceptible to cleavage by beta-lactamases but cannot distinguish between cleavage by metallo-beta-lactamases and other beta-lactamases. By modifying a side group of the cephalosporin, selectivity can be introduced allowing the probes to distinguish between various types of metallo-beta-lactamases.
摘要:
Compounds of formula (I) or salts thereof: ##STR1## wherein R.sup.1 is hydrogen, methoxy or formamido; R.sup.2 is an acyl group; CO.sub.2 R.sup.3 is a carboxy group or a carboxylate anion, or R.sup.3 is a carboxy protecting group, pharmaceutically acceptable salt-forming group or in vivo hydrolysable ester group; R.sup.4 represents hydrogen or up to four substituents; X is O, S, SO or SO.sub.2 ; Y is O, S, SO or SO.sub.2 ; n is 0 or 1; and m is 1 or 2. The compounds have antibacterial activity. Methods of synthesis of, and pharmaceutical formulations containing, compounds (I) are also described.
摘要翻译:式(I)化合物或其盐:其中R1是氢,甲氧基或甲酰氨基; R2是酰基; CO 2 R 3是羧基或羧酸根阴离子,或R 3是羧基保护基,药学上可接受的成盐基团或体内可水解的酯基; R4代表氢或至多四个取代基; X是O,S,SO或SO 2; Y是O,S,SO或SO 2; n为0或1; m为1或2.化合物具有抗菌活性。 还描述了合成方法和含有化合物(I)的药物制剂。
摘要:
Compounds of formula (I) or salts thereof: ##STR1## wherein R.sup.1 is hydrogen, methoxy or formamido; R.sup.2 is an acyl group; CO.sub.2 R.sup.3 is a carboxy group or a carboxylate anion, or R.sup.3 is a carboxy protecting group, pharmaceutically acceptable salt-forming group or in vivo hydrolysable ester group; R.sup.4 represents hydrogen or up to four substituents; X is O, S, SO or SO.sub.2 ; Y is O, S, SO or SO.sub.2 ; n is 0 or 1; and m is 1 or 2. The compounds have antibacterial activity. Methods of synthesis of, and pharmaceutical formulations containing, compounds (I) are also described.
摘要:
Compounds of the formula ##STR1## wherein A is ##STR2## R is hydrogen, lower alkyl, benzyl, p-methoxybenzyl, p-nitrobenzyl, diphenylmethyl, tri(lower alkyl)silyl, lower alkoxymethyl, 2,2,2-trichloroethyl, ##STR3## Y is halogen or lower alkoxy; R.sub.1 is lower alkyl, phenyl, or substituted phenyl; and X is hydrogen, lower alkanoyloxy, ##STR4## or certain heterothio groups; R.sub.4 is hydrogen or lower alkyl; R.sub.5 is lower alkyl; are disclosed. These compounds, particularly the free acids, possess the useful pharmacological property of inhibiting .beta.-lactamase enzymes as well as being useful as intermediates, particularly where R is a readily cleavable ester, in the preparation of antibacterially active 6.alpha.-methoxy penicillins and 7.alpha.-methoxy cephalosporins.
摘要翻译:式中的化合物是氢,低级烷基,苄基,对甲氧基苄基,对硝基苄基,二苯基甲基,三(低级烷基)甲硅烷基,低级烷氧基甲基, 三氯乙基,Y是卤素或低级烷氧基; R 1是低级烷基,苯基或取代的苯基; X是氢,低级烷酰氧基,或者某些杂硫基; R4是氢或低级烷基; R5是低级烷基; 被披露。 这些化合物,特别是游离酸具有抑制β-内酰胺酶的有用的药理学性质,并且可用作中间体,特别是其中R是易裂解的酯,在制备抗菌活性6α-甲氧基青霉素和7α 甲氧基头孢菌素。
摘要:
7-Aminocephalosporanic acid derivatives represented by the general formula (III), ##STR1## wherein X is hydrogen, hydroxyl, acetate or a nucleophilic residue, which are useful as a starting material for the synthesis of cephalosporin type antibiotics low in toxicity and broad in pharmacological effect can be easily prepared by allowing to react cephalosporin C or its derivative represented by the general formula (I), ##STR2## wherein X is as defined above, or a salt thereof with an .alpha.-keto derivative represented by the general formula (II), ##STR3## wherein R.sub.1 is carboxyl, aroyl or amide when R.sub.2 is hydrogen, and is carboxyl when R.sub.2 is alkyl or aryl, or its salt. In this case, the yield of the 7-aminocephalosporanic acid derivatives can be remarkably improved by carrying out the reaction in the presence of hydrogen peroxide. The yield can be further improved by adding thiosulfuric acid or a salt thereof after the completion of the reaction to decompose the unreacted hydrogen peroxide.
摘要:
A compound of the formula: ##STR1## wherein R.sup.1 represents mandeloyl or 2-(3-sydnone)-acetyl group and R.sup.2 represents a hydrogen atom, a halogen, an alkyl or an alkoxyl group, or a pharmaceutically accetable salt thereof, is found to have a broad antimicrobial spectrum and, in particular, effective against gram-negative bacteria as well as gram-positive ones. Examples thereof include 7-[D-(-)-mandelamido]-3-[6'-(3'-methylpyridazinyl)-thio-methyl]-3-cephem-4-carboxylic acid 2'-oxide, 7-[D-(-)-mandelamido]-3-[6'-(3'-methoxypyridazinyl)-thiomethyl]-3-cephem-4-carboxylic acid 1'-oxide, and 7-[2'-(3'-sydnone)acetamido]-3-[6"-(3"-methylpyridazinyl)-thiomethyl]-3-cephem-4-carboxylic acid 2"-oxide.
摘要:
The compounds of the subject invention are related to 2-substituted cephem compounds, which have a wide antimicrobial spectrum, in particular exhibit potent antimicrobial activity against beta-lactamase producing Gram negative bacteria, and pharmaceutical compositions comprising the same.
摘要:
The present invention is concerned with a novel process for the making of a compound of formula I ##STR1## by oxidizing the corresponding 3-hydroxymethyl-cephem derivative with an inorganic hypohalite or inorganic halite in the presence of compounds of formula III ##STR2## is wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, and Y are as defined herein.The process is useful for providing 3-formyl-cephem compounds useful in the making of cephalosporin derivatives.