摘要:
Preparation of an optically active alkamine in the sinister configuration, or a derivative of said alkamine, which is reacted with an 3-X-4-chloro(or RO-- where R is hydrogen or an alkali metal)-1,2,5-thiadiazole to prepare S-3-X-4-(3-substituted amino-2-hydroxypropoxy)-1,2,5-thiadiazole beta adrenergic blocking agents. Novel 3-morpholino-4-chloro(or RO--)-1,2,5-thiadiazoles and their preparation also are described.
摘要:
Preparation of an optically active alkamine in the sinister configuration, or a derivative of said alkamine, which is reacted with an 3-X-4-chloro(or RO- where R is hydrogen or an alkali metal)-1,2,5-thiadiazole to prepare S-3-X-4-(3-substituted amino-2-hydroxypropoxy)-1,2,5-thiadiazole beta adrenergic blocking agents. Novel 3-morpholino-4-chloro(or RO-)-1,2,5-thiadiazoles and their preparation also are described.
摘要:
Preparation of S-3-X-4-(3-substituted amino-2-hydroxypropoxy)-1,2,5-thiadiazole beta adrenergic blocking agents using as starting material an optically active alkalmine in the sinister configuration, or a derivative of said alkamine, which is reacted with an 3-X-4-chloro(or RO-where R is hydrogen or an alkali metal)-1,2,5-thiadiazole. Certain3-morpholino-4-chloro(or RO-)-1,2,5-thiadiazoles and certain alkamines and their preparation also are described. Preferred alkamines are S-3,5-disubstituted oxazolidines.
摘要:
9-(Dihalobenzyl)adenines are prepared uncontaminated with other positional isomers in a series of mild transformations starting from 4,5,6-triaminopyrimidine and proceeding via 7-(N-formyl-N-dihalobenzyl)amino[1,2,5]thiadiazolo[3,4-d]pyrimidine. The resulting compounds have anticoccidial activity and are useful in controlling cecal and/or intestinal coccidiosis when administered in minor quantities to animals, in particular to poultry usually in admixture with animal sustenance.
摘要:
Fluorinated anilines, especially p-fluoroaniline and 2,4-difluoroaniline, are prepared by treating aromatic azides with anhydrous hydrogen fluoride. The aromatic azides, in turn, are prepared from the corresponding anilines by treatment with nitrous acid or salt thereof and an alkali metal azide in the presence of a mineral acid, and in an aqueous-nonaqueous, two-phase environment.
摘要:
The invention relates to an improved method of preparing salicylic acid and derivatives from phenyl esters which comprises the step of fusing acetoxyphenyl, or derivative suitable for preparing the desired salicylic acid derivative, with M.sub.2 CO.sub.3 where M is potassium or sodium in the presence of carbon dioxide, at a temperature of from 150.degree. to 250.degree. C., and at a pressure of from atmospheric to 500 p.s.i.g.
摘要翻译:{PG,1本发明涉及一种制备水杨酸及其衍生物的改进方法,该方法包括将适合制备所需水杨酸衍生物的乙酰氧基苯基或衍生物与M(HD 2 {L CO {HD 3 {L,其中M为二氧化碳存在下的钾或钠,温度为150℃(20〜250℃,20〜20℃,压力为500psig)
摘要:
A method of preparing 2,4-difluoroaniline by reacting 2,4,5-trichloronitrobenzene with a fluorinating agent to form 2,4-difluoro-5-chloronitrobenzene which is then hydrogenated with hydrogen in the presence of a catalyst to form 2,4-difluoroaniline.
摘要:
An efficient method has been found for the removal of the 3-isomer present in crude 9-(2-chloro-6-fluorobenzyl)adenine. Crude 9-(2-chloro-6-fluorobenzyl)adenine is transalkylated in sulfuric acid-toluene to reduce the 3-isomer to undetectable levels (
摘要:
A method of preparing 2,4-difluoroaniline by reacting 2,4,5-trichloronitrobenzene with a fluorinating agent in the presence of a solid-liquid phase interface, and utilizing a phase transfer catalyst to form 2,4-difluoro-5-chloronitrobenzene, followed by hydrogenation with hydrogen in the presence of a hydrogenation catalyst to form 2,4-difluoroaniline.
摘要:
9-(Dihalobenzyl)adenines are prepared uncontaminated with other positional isomers in a series of mild transformations starting from 4,5,6-triaminopyrimidine and proceeding via 7-(N-formyl-N-dihalobenzyl)-amino[1,2,5]thiadiazolo[3,4-d]pyrimidine. The resulting compounds have anticoccidial activity and are useful in controlling cecal and/or intestinal coccidiosis when administered in minor quantities to animals, in particular to poultry usually in admixture with animal sustenance.