摘要:
6-alpha- and 6-beta-(Aminomethyl)penicillanic acid, 1,1-dioxide esters which are hydrolyzable under physiological conditions, particularly those wherein the ester radical is 1H-isobenzofuran-3-on-1-yl or (5-methyl-1,3-dioxol-2-on-4-yl)methyl, and an improved process and intermediates used in their synthesis.
摘要:
(3S, 5R)-Penam-3-carboxylic acid 1,1-dioxide, optionally having a methyl group at the 2-position, and esters thereof readily hydrolyzable in vivo, are useful for enhancing the effectiveness of several beta-lactam antibiotics against many beta-lactamase producing bacteria.
摘要:
Certain novel 6-acylamino-2,2-dimethyl-3-(5-tetrazolyl)penam derivatives, and salts thereof; their use as broad-spectrum antibacterial agents; and methods for their preparation. Their preparation comprises acylation of the novel intermediate, 6-amino-2,2-dimethyl-3-(5-tetrazolyl)penam or simple derivatives thereof, followed, in some cases, by further transformations of the 6-acylamino group or by removal of a protecting group from the 5-tetrazolyl moiety. Process for the preparation of 6-amino-2,2-dimethyl-3-(5-tetrazolyl)penam, simple derivatives thereof and intermediates therefor.
摘要:
Certain novel antibacterial 7-acylamino-3-substituted-4-(tetrazol-5-yl)-.DELTA..sup.3 -cephem derivatives, and salts thereof, and intermediates useful in their preparation.
摘要:
The present invention discloses novel 6-acylamino-2,2-dimethyl-3-phosphonopenams and certain lower alkyl esters thereof possessing antibacterial activity, methods for their production, and intermediates therefor; the production comprises the steps of reacting 6-triphenylmethylamino-2,2-dimethylpenam-3-carboxylic acid with lead tetraacetate to form the corresponding 3-acetoxy compound, the latter is converted to .alpha.-triphenylmethylamino-5,5-dimethyl-3-thiazoline-2-acetic acid which is condensed with dimethyl phosphite to produce .alpha.-triphenylmethylamino-5,5-dimethyl-4(0,0-dimethylphosphono)-thiazolidine-2-acetic acid which is cyclized to 6-triphenylmethylamino-2,2-dimethyl-3-(0,0-dimethylphosphono)penam and the latter is subsequently deblocked and acylated.
摘要:
Disclosed herein is an improved process for the preparation of known hypoglycemic piperidinesulfamylureas of the structure ##EQU1## wherein R is selected from the group consisting of 3-(2-methoxy)pyridyl, 3-(2-ethoxy)pyridyl and 2-(4-chloro)pyridyl and R' is selected from the group consisting of bicyclo[2.2.1]hept-5-en-2-yl-endo-methyl, bicyclo[2.2.1]hept-2-yl-endo-methyl, 7-oxabicyclo[2.2.1]hept-2-yl-methyl, 1-adamantyl and cycloalkyl having from five to eight carbon atoms.Said process comprises contacting 4-(2-pyridyl-amidoethyl) piperidine of the structure ##EQU2## with substantially one equivalent of sulfamide thereby exclusively sulfonating the piperidine nitrogen atom. Said 4-(2-pyridylamidoethyl)piperidines from the corresponding 4-(2-pyridylamidoethyl) pyridines by selectively activating the more basic nitrogen atom of said pyridine compound either by N-alkylation or by contact with acid and then exclusively reducing the activated pyridine ring with either hydrogen alone or in combination with a metal hydride. Said 4-(2-pyridylamidoethyl)pyridines are produced by contacting 4-(2-aminoethyl)pyridine with a pyridyl acid chloride of the formula R(C=O)Cl. The piperidine sulfonamides produced by the process of the instant invention are converted to the desired hypoglycemic agent by methods well-known to those skilled in the art.The 4-(2-pyridylamidoethyl)pyridines and piperidines of the instant invention are themselves novel compounds useful as intermediates in the synthesis of piperidine sulfamylurea hypoglycemic agents.
摘要:
Antiinflammatory and analgesic oxindole prodrugs of the formula ##STR1## wherein R.sup.10, R.sup.11, R.sup.12 and R.sup.13 are hydrogen, alkyl or halogen and R is methyleneoxyalkanoyl, methyleneoxyalkenoyl or alkenoyl.
摘要:
Novel benzenesulfonic acid addition salts of sultamicillin of the formula ##STR1## and hydrated forms thereof, where X is hydrogen or chloro, especially the crystalline dihydrate salts, having advantages over the prior art forms of sultamicillin in pharmaceutical dosage forms, most particularly those for use in pediatric medicine, method for their use and pharmaceutical compositions thereof.