A method for the preparation of 1-(4'-amino-3',5'-dichlorophenyl)-2-alkyl)or dialkyl)aminoethanols. The method involves preparation of the above compounds from the corresponding aminoketones by reduction with hydrogen in the presence of platinum oxide catalyst and a promoter, such as stannous chloride.
Method for promoting growth and reducing fat in animals using phenylethanolamine derivatives
申请人:AMERICAN CYANAMID COMPANY
公开号:EP0026298A1
公开(公告)日:1981-04-08
A method for the preparation of an animal feed composition comprising admixing an animal feed with from 0.01 to 400 grams per ton of feed of a compound of the following formula
wherein X, Y, Z, R,, R2, R3 and R4 are as defined in the text.
Some new compounds with the same general formula are claimed. These phenylethanol amine derivatives and their acid addition salts act as growth promotors and fat reducing agents in farm and companion animals.
Disclosed is a process for preparing β-agonist, 1-(4-amino-3,5-dichlorophenyl)-2-(tert-butylamino) ethanol, of Formula I. The process comprises refluxing 1-(4-amino-3,5-dichlorophenyl) ethanone of Formula II and selenium dioxide in the presence of 1,4-dioxane to form compound of Formula III. Further, compound of Formula III is heated at a temperature below 30° C. in the presence of t-butyl amine to form compound of Formula IV. The compound of Formula IV is treated with sodium borohydride to form compound of Formula I.
本发明公开了一种制备式 I 的 1-(4-氨基-3,5-二氯苯基)-2-(叔丁基氨基)乙醇的 β-激动剂的工艺。该工艺包括将式 II 的 1-(4-氨基-3,5-二氯苯基)乙酮和二氧化硒在 1,4-二氧六环存在下回流,形成式 III 的化合物。再将式 III 的化合物在 t-丁胺存在下于低于 30℃的温度下加热,生成式 IV 的化合物。将式 IV 的化合物用硼氢化钠处理,形成式 I 的化合物。
An ultrasensitive colloidal gold immunosensor to simultaneously detect 12 beta (2)-adrenergic agonists