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| Number | Title | Issue Date |
| 6916938 | Method for preparing sulfone or sulfoxide compound There is provided a method for preparing a sulfone or sulfoxide compound, characterized in that a sulfide compound is allowed to react with hydrogen peroxide in the presence of a metal oxide catalyst formed by the reaction of hydrogen peroxide with at least one meta... | 07/12/2005 |
| 5648484 | Catalytic enantioselective synthesis of a spriofused azetidinone A process for producing a compound of the formula ##STR1## comprises the following sequence of steps: ##STR2## wherein the various radicals are as defined in the specification.... | 07/15/1997 |
| 5621097 | Oxidation of organosulphur compounds A process for the oxidation of organosulphur compounds with hydrogen peroxide is provided. The process employs solid supported polyacids comprising tungsten, molybdenum and/or vanadium as catalysts. The supports are selected from compounds, preferably oxi... | 04/15/1997 |
| 5596095 | Formation and utility of sulfonic acid protecting groups The present invention is a method of protecting a sulfonic acid functional group in an organic molecule as a substituted or unsubstituted neopentyl sulfonate ester. The method allows the conversion of R--SO3 --H to R'--SO3 --H, where... | 01/21/1997 |
| 4801704 | Methylene penam and derivatives thereof There are presented compounds of the formula ##STR1## wherein R2, R3, R4 and m are as described herein.... | 01/31/1989 |
| 4555363 | Process for the preparation of ଲ-lactam compounds A process for the preparation of a ଲ-lactam having the partial structure (I): ##STR1## wherein R1 is an acyl group, which process comprises treating an imine having the partial structure (II): ##STR2## with a nucleophilic d... | 11/26/1985 |
| 4539149 | ଲ-Lactam antibacterial agents ଲ-Lactam antibiotics having an -formamido substituent on the carbon atom adjacent to the carbonyl group of the ଲ-lactam ring and in particular bicyclic compounds having the partial structure: ##STR1## Intermediates and processes fo... | 09/03/1985 |
| 4524073 | ଲ-Lactam compounds A compound of formula (I) or a pharmaceutically acceptable salt or in vivo hydrolysable ester thereof: ##STR1## wherein R represents an alkyl or aralkyl group, substituted on an alkyl carbon atom other than that adjacent to --NH-- group, with one or ... | 06/18/1985 |
| 4517124 | Process for preparing penem derivatives The present invention provides a process for the preparation of a compound of the formula (IV): ##STR1## or salt or ester thereof wherein R1 and R2 are independently hydrogen; an organic radical bonded via a carbon atom to the r... | 05/14/1985 |
| 4479947 | Oral absorption enhancement of carboxylic acid pharmaceuticals using (5-alkyl-2-oxo-1,3-dioxolen-4-yl)methyl ester group The (5-R-2-oxo-1,3-dioxolen-4-yl)methyl moiety: ##STR1## wherein R is loweralkyl of 1-6 carbon atoms, especially methyl or t-butyl; when utilized as an ester on a pharmaceutical having a carboxylic acid functionality, enhances oral absorption of the ... | 10/30/1984 |
| 4422971 | Process for the preparation of 6-aminopenicillanic acid-1,1-dioxide A novel process for the preparation of 6-aminopenicilanic acid-1,1-dioxide and its non-toxic, pharmaceutically acceptable salts by deacylation of a penicillin-1,1-dioxide or its salts of which the 3-carboxylic acid is protected by such an easily removable... | 12/27/1983 |
| 4410458 | Process for providing an oxidized penam This invention relates to a process for preparing an oxidized penam derivative of the formula: ##STR1## wherein R1 represents an amino or protected amino radical, and R3 represents a radical selected from the group consisting of carb... | 10/18/1983 |
| 4381307 | Soft tertiary amine esters of bio-affecting carboxylic acids Novel derivatives of known bio-affecting carboxylic acids R-COOH are disclosed, said derivatives having the structural formula ##STR1## wherein Y and Y' are each H or C1 -C4 alkyl; n is 0 or 1; R1 and R2 ar... | 04/26/1983 |
| 4353825 | 5,6-Dehydropenicillins A method is disclosed for the preparation of a class of dehydropenicillins by irradiating substituted 4-acylmethylthio-2-azetidinones and subsequently subjecting the as-obtained product to cyclization. Processing conditions and analytical data are reporte... | 10/12/1982 |
| 4347183 | Process for the synthesis of penems and carbapenems Described is a novel process for the preparation of penems and carbapenems useful as antibacterial agents which comprises the reaction of an appropriate 4-substituted-azetidine-2-one with an acid halide in the presence of a tertiary amine and an alkaline ... | 08/31/1982 |
| 4347355 | Inhibitors of transpeptidase New ଲ-lactams of the general structure: ##STR1## wherein R represents H or an acyl moiety known from the penicillin or cephalosporin art, R' is hydrogen, loweralkoxy, loweralkoxyalkyl, loweralkyl, phenylthio or loweralkylmercapto R" is loweralk... | 08/31/1982 |
| 4347182 | Preparation of penicillanic acid derivatives The compound 6-ଲ-chloropenicillanic acid can be prepared in substantially pure form and is a ଲ-lactamase inhibitor which may be used to enhance the effectiveness of penicillins acid cephalosporins against ଲ-lactamase producing lacteria. ... | 08/31/1982 |
| 4344955 | Penicillin 1,1-dioxides Anti-bacterially active penicillin 1,1-dioxides of the formula ##STR1## or a salt thereof, in which R1 denotes a hydrogen atom or an ester-forming radical, R2 denotes a hydrogen atom or optionally substituted alkoxy group, R3 | 08/17/1982 |
| 4308259 | Penicillin derivatives A penicillin of formula (I) or a pharmaceutically acceptable salt or in vivo hydrolysable ester thereof: ##STR1## wherein R is C1-6 alkyl; an optionally substituted 5-membered heterocyclic ring containing one or two heteroatoms selected fr... | 12/29/1981 |
| 4288366 | Method of preparation of 5,6-dehydropenicillins A method is disclosed for the preparation of a class of dehydropenicillins by irradiating substituted 4-acylmethylthio-2-azetidinones and subsequently subjecting the as-obtained product to cyclization. Processing conditions and analytical data are reporte... | 09/08/1981 |
| 4255330 | Process for preparing 6-substituted amino-2-substituted-pen-2-em-3-carboxylic acid Disclosed are 6-substituted amino-2-substituted-pen-2-em-3-carboxylic acids of the following structure: ##STR1## wherein R1 is hydrogen or acyl, R2 is hydrogen or methoxyl, and R3 is, inter alia, hydrogen, --R, --OR, ... | 03/10/1981 |
| 4219462 | 6-Methyl penicillins New 6-methyl penicillins and the corresponding 6-aminopenicillanic acid compounds and processes for the preparation of these penicillins are provided. The new penicillins are antibiotics which are active against various gram-negative and gram-positive pat... | 08/26/1980 |
| 4215124 | 6 Substituted amino-2-substituted-pen-2-em-3-carboxylic acid Disclosed are 6-substituted amino-2-substituted-pen-2-em-3-carboxylic acids of the following structure: ##STR1## wherein R1 is hydrogen or acyl, R2 is hydrogen or methoxyl, and R3 is inter alia, hydrogen, --R, --OR, -... | 07/29/1980 |
| 4155905 | 6-Substituted penicillanic acid and derivatives thereof Disclosed herein are penicillanic acids and derivatives thereof which are substituted in the 6-position, processes for preparing such compounds and the utility thereof. The compounds of the invention have been found to be useful as antibacterial agents.... | 05/22/1979 |
| 4154845 | Derivatives of 6-aminopenicillanic acid Novel 6-methoxy and 6-thioalkyl-6-acylamido-penicillanic acids and their non-toxic pharmaceutically-acceptable salts, esters and amides which are useful as antibiotics. The products are prepared by treating an ester of 6-substituted-6-aminopenicillanic ac... | 05/15/1979 |
| 4133807 | 4-Thioxo-2-azetidinones A method is disclosed for the preparation of a class of dehydropenicillins by irradiating substituted 4-acylmethylthio-2-azetidinones and subsequently subjecting the as-obtained product to cyclization. Processing conditions and analytical data are reporte... | 01/09/1979 |
| 4119775 | 4-Oxo-1-pyridinyl cephalosporin derivatives Novel substituted(4-oxo-1-pyridinyl)acetylaminopenicillin and cephalosporin derivatives are prepared which are useful antibacterial agents.... | 10/10/1978 |
| 4102882 | Process to prepare novel antibiotic compounds 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-hypoc... | 07/25/1978 |
| 4081443 | Penicillin oxides Compounds of the formula: ##STR1## (where COB is carboxy or protected carboxy and X is hydrogen or nucleophilic group) preparable by oxidation of the corresponding N-nitrosopenicillin derivatives are useful as starting materials for synthesizing know... | 03/28/1978 |
| 4081546 | 3-Substituted aminocycloalkyl esters of penicillin antibiotics A class of substituted aminocycloalkyl esters of penicillins have improved pharmacokinetic properties and are hydrolysed to the antibacterially active penicillin.... | 03/28/1978 |
| 4071529 | Derivatives of 6-aminopenicillanic acid Novel 6-methoxy and 6-thioalkyl-6-acylamidopenicillanic acids and their non-toxic pharmaceutically-acceptable salts, esters and amides which are useful as antibiotics. The products are prepared by treating an ester of 6-substituted-6-aminopenicillanic aci... | 01/31/1978 |
| 4070477 | 2-Penem compounds The invention relates to 6-amino-2-penem-3-carboxylic acid compounds of the formula ##STR1## in which R1a denotes hydrogen or an amino protective group R1A and R1b represents hydrogen ... | 01/24/1978 |
| 4062842 | Method for preparing 7-substituted cephalosporins and 6-substituted penicillins by replacement of sulfur-containing groups Disclosed is a method for replacing 7-lower alkylthio and 7-arylthio groups from cephalosporins with lower alkanoyloxy,lower alkoxy, aryloxy, aroyloxy, amino, lower alkylamino and azido moieties, and for replacing 6-lower alkylthio and 6-arylthio groups f... | 12/13/1977 |
| 4061629 | 6-Amino-6-arylthio penicillanic acids and derivatives thereof 6-Amino and 6-benzalimino-6-arylthio penicillins are disclosed. These compounds are useful as intermediates in the preparation of 6-acylamino-6-arylthio penicillins.... | 12/06/1977 |
| 4046759 | Penicillin esters There disclose new penicillin esters and S-oxides thereof which are of value as intermediates for the preparation of various cephalosporin antibiotics.... | 09/06/1977 |
| 4036829 | Lactonyl esters of penicillins Lactonyl esters of Penicillins of the formula ##STR1## WHEREIN R1 is an antibacterially active penicillin-completing side chain; R is hydrogen, methyl or phenyl; and Ra, Rb, Rc, Rd are hydrogen, lower alkyl, lower alkoxy, halo, and nitro, ... | 07/19/1977 |
| 4035359 | 6, ଲ-Substituted penicillin derivatives Novel 6-methoxy and 6-thioalkyl-6-acylamido-penicillanic acids and their non-toxic pharmaceutically-acceptable salts, esters and amides which are useful as antibiotics. The products are prepared by treating an ester of 6-substituted-6-aminopenicillanic ac... | 07/12/1977 |
| 4035352 | Preparation of 7-substituted amino-desacetoxycephalosporanic acid compounds Novel 6-substituted amino-penicillanic acid anhydrides useful in the process for the preparation of 7-substituted amino-desacetoxycephalosporanic derivatives comprising converting a 6-substituted amino-penicillanic acid sulfoxide into an anhydride of a ... | 07/12/1977 |
| 4035354 | Thioamides of beta-lactam antibiotics The invention relates to compounds of the formula: ##STR1## wherein R stands for Benzyl, Phenoxymethyl, 4-amino-4-carboxy-1-butyl, R3 o--, r3 s--, r3 r4 n-- wherein R3 is loweralkyl, aryl or arylloweralkyl... | 07/12/1977 |
| 4012410 | 2-(4-Methoxyoxazolidinone-4-yl)thiazolidine t-butyl esters 6-acylamido-6-methoxypenicillanic acids are obtained by reacting a 6-acylamidopenicillanic acid with mercuric acetate in methanol to yield a methyl -methoxypenicilloate. Esterification of the latter with isobutylene affords the methyl, t-butyl dies... | 03/15/1977 |
