摘要:
Antibacterial compounds represented by the following formula including their pharmaceutically acceptable salts and esters; process for preparing them; pharmaceutical preparation comprising them; and method for combating infections by administering them: ##STR1## (wherein Hal is halogen;R.sup.1 is hydrogen or an amino-protecting group;R.sup.2 is alkyl; andR.sup.3 is hydrogen or a carboxy-protecting group.)
摘要:
Intermediates (I) for preparing a potent antibacterial, 1-oxadethiacephalosporin, are shown by the following formula ##STR1## (wherein R is a group of acyl-minus-carbonyl derived from a carboxylic or carbonic acid;COB is carboxy or protected carboxy;X is hydrogen or a nucleophilic group;Y is a nucleophilic group; andZ is a leaving group)and prepared from the corresponding exomethylene compound (II) by addition of a compound of formula: Y-Z (in which Y and Z are as defined above).
摘要:
Potent antibacterial cephalosporin analogues of the following formula in forms of free acids, pharmaceutically acceptable salts, or esters preparable from penicillins through azetidinone derivatives by way of a new process, and utilizable as active ingredients in bactericidal compositions for pharmaceutical and veterinary use: ##STR1## (wherein Acyl is selected from phenylacetyl, D-mandeloyl, .alpha.-phenylmalonyl, D-.alpha.-(3-methanesulfonyl-2-oxoimidazolidin-l-yl)carbonamido-.alpha.-phenylacetyl, and 2-thienylacetyl).
摘要:
A process for preparing compounds having the formula: ##STR1## WHEREIN R is phenoxymethyl or benzyl; R.sub.2 is 1-methoxyethylidene, 1-hydroxyethylidene, or 1,1-dimethoxyethylidene; andR.sub.3 is trichloroethyl, diphenylmethyl, p-nitrobenzyl, trityl, phenyl, naphthyl, or trimethylstannyl;Which comprises treating a compound of the following formula: ##STR2## where R, R.sub.2 and R.sub.3 are as defined above, WITH AgClO.sub.4, AgBF.sub.4, AgIO.sub.4, AgPF.sub.6, CF.sub.3 COOAg, CH.sub.3 SO.sub.3 Ag, CF.sub.3 SO.sub.3 Ag, CH.sub.3 COOAg, or AgNO.sub.3 in aqueous dioxane, aqueous tetrahydrofuran or mixtures thereof.
摘要:
An intermediate represented by following formula for synthesizing 3-hydroxy-3-cephem compounds. ##STR1## wherein A and B each is a hydrogen or amino substituent; R is a hydrogen or thiol substituent; Hal is a halogen; X is a hydroxy or carboxy protecting group; the broken line between A and R shows that when R and B are hydrogens, and A is a carboxylic acyl, the substituents can be combined to form an azetidinothiazoline bicyclic ring; and the enamine derivatives thereof.
摘要:
A transmission case includes a power transmission mechanism; a first case body and an adapter portion. The adapter portion includes a boss portion through which the output shaft is inserted, a first concave portion provided on an outer peripheral side of the boss portion and open rearward in the shaft direction, which is on the power output side of the power transmission mechanism, and a second concave portion open outward in a radial direction of the boss portion with the second concave portion separated in the shaft direction from the first concave portion by a separating wall.
摘要:
A novel chemical, fluorochlorocyclopropane (I) of the following formula: ##STR1## is prepared by the addition of fluorochlorocarbene to the corresponding olefin (II) of the following formula:CH.sub.2 .dbd.CR.sup.1 -R.sup.2The compound is a useful intermediate for synthesizing some chemicals, e.g., some cephalosporins.(wherein R.sup.1 is hydrogen, halogen, 1 to 8C alkylamino, alkoxy, or alkylthio andR.sup.2 is halogen, 1 to 8C alkylamino, alkoxy, or alkylthio).
摘要:
A process for preparing 3.beta.-amino-4.beta.-substituted-2-azetidinones, which comprises condensing a 3.alpha.-amino-4.beta.-substituted-2-azetidinone with a trihalogenoacetaldehyde or the reactive derivative thereof to give a 3.alpha.-(2,2,2-trihalogenoethylidene)amino-4.beta.-substituted-2-azetidinones, treating the latter with a base to give a 3-(2,2-dihalogenovinyl)imino-4.beta.-substituted-2-azetidinone, reducing the latter with a metal hydride to give a 3.beta.-(2-halogenovinyl)amino-4.beta.-substituted-2-azetidinone, and hydrolyzing the latter to give the objective compound.
摘要:
Novel 5-fluorouracil derivatives of the following general formula ##STR1## wherein R.sup.1 is hydrogen, C.sub.1 -C.sub.5 alkyl, C.sub.6 -C.sub.10 aryl, C.sub.7 -C.sub.10 aralkyl, C.sub.1 -C.sub.12 alkanoyl, C.sub.2 -C.sub.6 alkoxycarbonyl, C.sub.1 -C.sub.5 alkanoyloxymethyl, carbamoyl or tri-C.sub.1 -C.sub.5 alkylsilyl;R.sup.2 is hydrogen, C.sub.1 -C.sub.5 alkyl, C.sub.6 -C.sub.10 aryl or C.sub.7 -C.sub.10 aralkyl;X is hydrogen, halogen or C.sub.2 -C.sub.6 alkoxycarbonyl;Y is O, NR' (R' is hydrogen or C.sub.1 -C.sub.5 alkyl), S, SO or SO.sub.2 ; andn is an integer of 1-3.which are orally administrable anti-tumor agents.
摘要:
A process for preparing free carboxylic acids which comprises treating an optionally substituted benzyl ester with a Lewis acid, preferably in the presence of a cation acceptor, followed by hydrolysis, if required.