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:
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.
摘要:
A novel process for producing o-hydroxybenzyl alcohols useful as raw materials or intermediates in chemical or pharmaceutical industries, which comprises reacting phenols or naphthols with aromatic boronic acids and aldehydes in the presence of organic carboxylic acids, followed by degradation of the cyclic ester intermediates.
摘要:
A cast product for an automatic transmission includes a body portion; and a projecting portion that projects from the body portion. A wall surface of the projecting portion is connected and integratedly cast with the body portion by a plurality of ribs. Among the plurality of ribs, at least one rib is integratedly joined on one side thereof with the projecting portion along the wall surface of a side edge portion of the projecting portion, while another side of the at least one rib is integratedly joined with the body portion.
摘要:
Highly selective and high yield process for producing antitumor agent 1-phthalidyl-5-fluorouracil derivatives of formula (I) which comprises reacting a phthalidyl compound (II) with an amine (III) to yield the quaternary ammonium salts (IV), and reacting the latter with 5-fluorouracil. ##STR1## [wherein X is leaving group; ##STR2## is triethylamine, N-methylmorpholine, N-ethylmorpholine, and the like; R.sup.4 and R.sup.5 each is hydrogen, trialkylsilyloxy, alkoxy, nitro, cyano, carboxy, or alkoxycarbonyl].
摘要翻译:用于制备式(I)的抗癌剂1-邻苯二甲酰基-5-氟尿嘧啶衍生物的高选择性和高产率方法,其包括使邻苯二甲酰化合物(II)与胺(III)反应以产生季铵盐(IV),并使 后者与5-氟尿嘧啶。 + TR [其中X是离开组; 三乙胺,N-甲基吗啉,N-乙基吗啉等; R 4和R 5各自为氢,三烷基甲硅烷氧基,烷氧基,硝基,氰基,羧基或烷氧基羰基。
摘要:
Orally administrable 5-fluorouracil derivatives of the general formula: ##STR1## [wherein R.sup.1 is aryl or substituted aryl; R.sup.2 is acyclic or cyclic alkyl, adamantyl, aryl or substituted aryl; R.sup.3 and R.sup.4 are the same or different, each representing hydrogen atom or lower alkyl] effective against malignant tumors.