摘要:
Disclosed are 1-substituted-6-(1-hydroxyethyl)-2-(2-aminoethylthio)-1-carbadethiapen-2-em-3-carboxylic acids (I) and their pharmaceutically acceptable salts and esters which are useful as antibiotics; such compounds are prepared by total synthesis. ##STR1## wherein R.sup.1 and R.sup.2 are, inter alia, substituted and unsubstituted alkyl, aryl, aralkyl, cycloalkyl, cycloalkylalkyl and the spiro substituent formed by the joinder of R.sup.1 and R.sup.2.
摘要:
A process is provided which yields derivatives of cephalosporins and penicillins. The process starts with 7-acylaminocephalosporin, or 6-acylaminopenicillin, then the latter compounds are treated with an organolithium compound, followed with t-butyl-hypochlorite. Finally, a defined reagent is added yielding a side chain on the carbon adjacent to the amino-nitrogen. Novel intermediate compounds are also described. The end compounds prepared are active against both gram-positive and gram-negative bacteria.
摘要:
Disclosed are 6-amido-2-S-oxides of substituted 2-organothio-pen-2-em-3-carboxylic acids (I) which are useful as antibiotics and as intermediates in the synthesis of substituted pen-2-em-3-carboxylic acids: ##STR1## wherein: R.sup.1 is H or acyl; R.sup.2 is hydrogen or methoxyl; R.sup.3 is alkyl having from 1-6 carbon atoms; phenylalkyl having 7-12 carbon atoms; and cycloalkyl having 3-6 carbon atoms; and R.sup.4 is hydrogen, a removable protecting group or a pharmaceutically acceptable salt or ester moiety.
摘要:
Disclosed are 6-(1'-hydroxyethyl)-2-substituted-pen-2-em-3-carboxylic acids of the following structure: ##STR1## wherein R is, inter alia, hydrogen, --OR, --SR, --NR.sub.2, alkyl, aryl, aralkyl, or heterocylcyl; n is 0 or 1; when n=1 R is as defined but not --SR. Such compounds and their pharmaceutically acceptable salt and ester derivatives are useful as antibiotics. Also disclosed are processes for the preparation of such compounds, pharmaceutical compositions comprising such compounds and methods of treatment comprising administering such compounds and compositions when an antibiotic effect is indicated.
摘要:
Disclosed is a process for the total synthesis of 1-carbapenem antibiotics (I) from L-aspartic acid via central intermediates II and III: ##STR1## wherein R is hydrogen, a pharmaceutically acceptable ester moiety or salt cation, or a readily removable blocking group; R.sup.6, R.sup.7 and R.sup.8 are, inter alia, independently selected from the group consisting of hydrogen, alkyl, alkenyl, aryl and aralkyl; R.sup.1' and R.sup.e are hydrogen, or a readily removable protecting group; R.sup.a, R.sup.b and R.sup.c are selected from alkyl, aryl or aralkyl.
摘要翻译:公开了通过中心中间体II和III从L-天冬氨酸全合成1-碳青霉烯类抗生素(I)的方法:其中R是氢,药学上可接受的酯部分 或盐阳离子,或易于除去的封闭基团; R6,R7和R8特别是独立地选自氢,烷基,烯基,芳基和芳烷基; R 1和Re为氢或易脱除的保护基; R a,R b和R c选自烷基,芳基或芳烷基。
摘要:
Disclosed are S-oxides of 6-, 1- and 2-substituted-1-carbadethiapen-2-em-3-carboxylic acids having the structure: ##STR1## wherein: n is 1 or 2; and R.sup.1, R.sup.6, R.sup.7 and R.sup.8 are, inter alia, independently selected from the group consisting of hydrogen, alkyl, alkenyl, aryl and aralkyl. Such compounds as well as their pharmaceutically acceptable salt, ester and amide derivatives are useful as antibiotics. Also disclosed are processes for the preparation of such compounds, pharmaceutical compositions comprising such compounds and methods of treatment comprising administering such compounds and compositions when an antibiotic effect is indicated.
摘要:
Disclosed are 3- and 6-substituted 7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acids having the structure: ##STR1## wherein R.sup.6, R.sup.7 and R.sup.8 are, inter alia, independently selected from the group consisting of hydrogen, alkyl, alkenyl, aryl and aralkyl. Such compounds as well as their pharmaceutically acceptable salt, ester and amide derivatives are useful as antibiotics. Also disclosed are processes for the preparation of such compounds, pharmaceutical compositions comprising such compounds and methods of treatment comprising administering such compounds and compositions when an antibiotic effect is indicated.
摘要:
Process and intermediate products useful in the preparation of cephalosporin compounds having a substituent at the 7-position in place of hydrogen are provided. The new cephalosporin compounds are active against various gram-negative and gram-positive organisms.
摘要:
Disclosed are 6-(1'-hydroxyethyl)-3-substituted-1-azabicyclo[3.2.0]hept-2-en-7-one-2-carboxylic acids(I): ##STR1## wherein X is halo, oxygen (the 2-3 bond is saturated and the species I exists as the carboxylate salt or ester), or --OR wherein R is, inter alia, acyl, alkyl or aralkyl. Such compounds and their O- and carboxyl derivatives are useful as antibiotics. Also disclosed are processes for the preparation of such compounds, pharmaceutical compositions comprising such compounds and methods of treatment comprising administering such compounds and compositions when an antibiotic effect is indicated.
摘要:
Disclosed are antibiotic 7-(substituted methyl) cephalosporins, derivatives and nuclear analogues thereof; wherein the methyl substituent is, inter alia, hydroxyl, ketonic oxygen, imino nitrogen, amino or thio. Also disclosed are processes for the preparation of such compounds and their pharmaceutically acceptable salt, ester and amide derivatives; pharmaceutical compositions comprising such compounds; and methods of treatment comprising administering such compounds and compositions when an antibiotic effect is indicated.