摘要:
The invention provides a conjugate of formula I: R-L-Y I or a salt thereof, wherein R, L, and Y have any of the values described in the specification, as well as compositions comprising a conjugate of formula I. The conjugates are useful for labeling.
摘要:
A bioprocess for preparing adipoyl-7-ACA comprising the steps: (a) transforming cells of a strain of Penicillium chrysogenum which produces isopenicillin N with an expression vector containing DNA encoding an enzyme, having expandase activity capable of accepting adipoyl 6-APA as a substrate, an enzyme having hydroxylase activity capable of accepting adipoyl-7-ADCA as a substrate and an enzyme having acetyl transferase activity capable of accepting adipoyl 7-ADAC as a substrate; (b) culturing the transformed cells from step a) in a suitable culture medium containing an adipate feedstock, wherein said cells produce adipoyl 6-APA; and (c) culturing the transformed cells producing adipoyl 6-APA of step b) under conditions suitable for expression of said DNA encoding enzyme, thereby producing the end product adipoyl-7-ACA.
摘要:
.beta.-Lactam antibiotics of formula (I) or a salt thereof, wherein R.sup.1 is hydrogen, methoxy or formamido; R.sup.2 is an acy group; CO.sub.2 R.sup.3 is a carboxy group or a carboxylate anion, or R.sup.3 is a readily removable carboxy protecting group; R.sup.4 represents up to four substituents; X is S, SO, SO.sub.2, O or CH.sub.2 ; m is 1 or 2; and n is 0, useful in the treatment of bacterial infec ##STR1##
摘要翻译:式(I)的β-内酰胺抗生素或其盐,其中R 1是氢,甲氧基或甲酰氨基; R2是一个acy组; CO 2 R 3是羧基或羧酸根阴离子,或R 3是容易除去的羧基保护基; R4代表最多四个取代基; X是S,SO,SO 2,O或CH 2; m为1或2; 且n为0,可用于治疗细菌感染
摘要:
A 3-[(E)-1-propenyl]cephem compound represented by formula (I): ##STR1## wherein R represents hydrogen, a protective group for an amino group, or the group shown by formula (II): ##STR2## in which R.sup.3 is a protective group for an amino group, R.sup.4 is a protective group for a hydroxyl group, and W is --CH.dbd. or --N.dbd.; R.sup.2 represents a protective group for a carboxyl group; and X represents hydrogen or chlorine. The compound is useful as an intermediate for producing cephem antibiotics and is prepared by isomerizing the corresponding 3-[(Z)-1-propenyl]cephem compound in an inert organic solvent in the presence of an aromatic thiol. The compound of formula (I) wherein X is chlorine can be converted into a 3-[(E)-3-ammonio-1-propenyl]cephem derivative through the reaction with a tertiary amine.
摘要:
Fluorogenic substrates of the general formula I ##STR1## in which one of X and Y is a fluorescent donor moiety and the other is a quencher (which may or may not re-emit); R' is selected from the group consisting of H, lower (i.e., alkyl of 1 to about 5 carbon atoms) and (CH.sub.2 OH).sub.n OH, in which n is 0 or an integer from 1 to 5; R" is selected from the group consisting of H, physiologically acceptable metal and ammonium cations, --CHR.sup.2 OCO(CH.sub.2).sub.n CH.sub.3, --CHR.sup.2 OCOC(CH.sub.3).sub.3, acylthiomethyl, acyloxy-alpha-benzyl, delta-butyrolactonyl, methoxycarbonyloxymethyl, phenyl, methylsulphinylmethyl, beta-morpholinoethyl, dialkylaminoethyl, acyloxyalkyl, dialkylaminocarbonyloxymethyl and aliphatic, in which R.sup.2 is selected from the group consisting of H and lower alkyl; A is selected from the group consisting of S, O, SO, SO.sub.2 and CH.sub.2 ; and Z' and Z" are linkers for the fluorescent donor and quencher moieties. The substrates are useful in conjunction with .beta.-lactamase as reporter gene in a wide range of assays, for example to determine protein localization or bacterial resistance.
摘要:
A substantially flat collapsed plastic bag with an evacuation form unit insert positioned therein as manufactured to serve as a form about which the filled bag will collapse as it is emptied. The form unit comprises a ring for mounting the unit on the spout of the bag and a multi-channel form extending radially from the ring and hingedly connected thereto. A simple method is provided for manufacturing the bag with the form unit insert.
摘要:
The invention relates to a new economical and simple process, using a new intermediate compound, for the production of 3'-substituted 7-amino-3-propenyl-4-cephem-carboxylic acid derivatives of formula ##STR1## wherein R is hydrogen, a negative charge or a silyl protecting group, R.sub.o is hydrogen or methoxy, R.sub.1 is hydrogen or a silyl protecting group and X is the radical of a nucleophile, and their acid addition salts.
摘要:
Chromogenic and fluorogenic substrates for .beta.-lactamase, methods for synthesis thereof and methods for detecting .beta.-lactamase in a sample are provided. The substrates are substantially colorless or substantially nonfluorescent .beta.-lactam compounds which include an electronegative leaving group. The leaving group comprises a carbamate, carbonate, thiocarbamate or thiocarbonate linkage and a fluorescent moiety or a moiety capable of producing a visually detectable colored product. Upon cleavage of the lactam ring by .beta.-lactamase, the leaving group is liberated and fluorescence or a colored product is produced.
摘要:
A method for preparing a new class of protected amino intermediates is provided which utilizes reaction of an imido protected primary amine with a secondary amine. The intermediates thus provided are suitably protected for nucleophilic functionalization on the residue of the primary amine. The desired imido protected amine thus derivatized may be regenerated using acid. Further provided are methods for resolving racemic primary amines. Also provided are .beta.-lactam intermediates protected with the new amino protecting group which are useful in the preparation of .beta.-lactam antibiotics.
摘要:
This invention relates to 2-[(substituted)methylene]cephalosporin sulfones and in particular 2-[(heteroaryl substituted)methylene]cephalosporin sulfones which are effective elastase inhibitors as well as effective thrombin inhibitors and therefore are useful as anti-inflammatory, anti-degenerative and anti-thrombin agents.