摘要:
An antibacterial cephalosporin hydroxamic acid derivative represented by the following formula (I), processes for its preparation, compositions containing the same as an active ingredient, and a method for killing bacteria by contacting with said compound. ##STR1## (wherein, R is acyl; R.sup.1 is hydrogen or methoxy; R.sup.2 is alkylene; R.sup.3 is hydrogen, aliphatic group or a hydroxy-protecting group; R.sup.4 is hydrogen or amino-protecting group; R.sup.5 is hydrogen, light metal atom or carboxy-protecting group; and X is oxygen, sulfur, or sulfinyl).
摘要:
An antibacterial cephalosporin hydroxamic acid derivative represented by the following formula (I), processes for its preparation, compositions containing the same as an active ingredient, and a method for killing bacteria by contacting with said compound. ##STR1## (wherein, R is acyl; R.sup.1 is hydrogen or methoxy; R.sup.2 is alkylene; R.sup.3 is hydrogen, aliphatic group or a hydroxy-protecting group; R.sup.4 is hydrogen or amino-protecting group; R.sup.5 is hydrogen, light metal atom or carboxy-protecting group; and X is oxygen, sulfur, or sulfinyl).
摘要翻译:由下式(I)表示的抗菌头孢菌素异羟肟酸衍生物,其制备方法,含有该活性成分的组合物,以及通过与所述化合物接触来杀死细菌的方法。 (I)(I)(其中R为酰基; R 1为氢或甲氧基; R 2为亚烷基; R 3为氢,脂族基或羟基保护基; R 4为氢或氨基保护基; R 5为氢, 金属原子或羧基保护基; X是氧,硫或亚磺酰基)。
摘要:
Antibacterial 7.beta.-arylmalonamido-7.alpha.-methoxy-3-heterocyclic thiomethyl-3-cephem-4-carboxylic acids of the formula: ##STR1## wherein Ar is a heterocyclic group or p-oxysubstituted phenyl; COB.sup.1 and COB.sup.2 are each a carboxy or protected carboxy group; and Het is an unsubstituted or substituted heterocyclic group. These compounds are prepared from, e.g., 7.beta.-amino-7.alpha.-methoxy-3-heterocyclic thiomethyl-3-cephem-4-carboxylic acid derivatives by acylation with arylmalonic acid or reactive derivatives thereof. They are useful as an active ingredient in antibacterial pharmaceutical preparations.
摘要:
Antibacterial 7.beta.-arylmalonamido-7.alpha.-methoxy-3-optionally alkylated thiadiazolylthiomethyl-1-oxadothiacephalosporins of the following formula: ##STR1## (wherein Ar is 2-thienyl, 3-thienyl, phenyl, p-hydroxyphenyl, p-acyloxyphenyl or p-protected hydroxyphenyl;COB.sup.1 and COB.sup.2 each is carboxy, protected carboxy or a carboxylate salt; andR is hydrogen or lower alkyl),processes for preparing said compounds, a pharmaceutical or veterinary composition comprising the said compounds and pharmaceutical carrier and a method for treating or preventing human or veterinary infectious diseases comprising administering the said compound.
摘要:
When irradiating a sample with light from a light source through an object lens, discretely changing a relative position between a beam condensing position of the object lens and the sample in an optical axis direction of the converging beam, obtaining light intensity information from the sample at each relative position, extracting plural pieces of light intensity information from a light intensity information group, estimating a maximum value on a change curve adaptive to the plural pieces of extracted light intensity information and the relative position for the maximum value, and obtaining the estimated maximum value of the light intensity information and relative position as brightness information and height information, these information about the sample can be continuously obtained by discretely performing an iterative operation on the relative position between a beam condensing position of the object lens and the sample in an optical axis direction of the converging beam.
摘要:
A semiconductor device inspection system having an improved measurement accuracy and in operability. A semiconductor device is observed from the bottom surface side. First, image data obtained upon image pickup under infrared illumination is converted into first left-to-right-reversed image data corresponding to a left-to-right-reversed image and the first reversed image data is stored. Then an image is obtained under no illumination from very weak light emitted from an abnormal portion when a bias is applied to the semiconductor device. Image data of the very weak light image is then converted into second left-to-right-reversed image data corresponding to a left-to-right-reversed image. The first and second left-to-right-reversed image data are superimposedly added to each other and a superimposed image is displayed with the abnormal portion being superimposed on a chip pattern as seen from the top surface of the semiconductor device.
摘要:
By heating an N-(2-hydroxyethyl)dithiocarbamate ester protected at its hydroxy group as an ether in the presence of an azide, the corresponding 1-(protected hydroxyethyl)-1H-tetrazole-5-thiol is obtained, and then, if required, deprotecting the etheric protection to give an industrially useful chemical, 1-(2-hydroxyethyl)-1H-tetrazole-5-thiol.
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:
.alpha.-[3(R)-Substituted amino-4(R)-substituted alkoxy-2-oxo-azetidin-1-yl]-.alpha.-isopropenylacetate (Ia) and .alpha.-[3(R)-substituted amino-4(R)-substituted alkoxy-2-oxo-azetidin-1-yl]-.alpha.-isopropylideneacetate (Ib) prepared from (1R,5S)-.alpha.-(3-substituted-7-oxo-4-oxa-2,6-diazabicyclo[3.2.0]hept-2-en-6-yl)-.alpha.-isopropenylacetate or (1R,5S)-.alpha.-(3-substituted-7-oxo-4-oxa-2,6-diazabicyclo-[3.2.0]hept-2-en-6-yl)-.alpha.-isopropylideneacetate with a primary alcohol in the presence of an acid. The products are useful intermediates for preparing oxadethiacephalosporins.
摘要:
Antibacterial 1-oxadethiacephalosporins of the formula: ##STR1## [wherein Ar is ##STR2## (in which Acyl is organic or inorganic acyl); COB.sup.1 and COB.sup.2 each is carboxy or protected carboxy;Het is ##STR3## (in which COB.sup.3 is carboxy or protected carboxy); and Y is hydrogen or methoxy;and when COB.sup.1, COB.sup.2, and/or COB.sup.3 is carboxy, pharmaceutically acceptable salts thereof are included, but with a proviso that when Y is methoxy, Het is ##STR4## a pharmaceutical or veterinary composition comprising the said 1-oxadethiacephalosporins and pharmaceutical carrier, and a method for treating or preventing human or veterinary infectious diseases comprising administering the said 1-oxadethiacephalosporin.