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.
quinoxalinones) were efficiently synthesized in excellent yields via α-bromoketones with o-substituted aniline (2-aminothiophenol, aryl-1,2-diamines and 2-aminophenol). This protocol accomplishes sp3 C-H bond oxidation and functionalization in one-pot without any metal catalyst.
α‐Bromoketones undergo selenium dioxide oxidation to yield reactive 2‐oxo‐2‐arylacetyl bromides that are trapped by aryl‐1,2‐diamines, 1,2‐aminophenol or 1,2‐aminothiophenol to give quinoxalinones, benzoxazinones, and benzothiazinones, respectively, in good yield.