Tag Archives: (t)-pseudo-ephedrin

Process for converting (t)-pseudo-ephedrin to (-)-ephedrin

Application Number: 00109749Application Date: 2000.07.05Publication Number: 1283611Publication Date: 2001.02.14Priority Information: International: C07C213/08;C07C215/30Applicant(s) Name: Tianjin Univ.Address: Inventor(s) Name: Yuan Yingjing;Li Jinliang;Ma ZhonghaiPatent Agency Code: 12201Patent Agent: ren yanAbstract A process for converting (+)-pseudo-ephedrin to (-)-ephedrin includes dissolving (+)-pseudo-ephedrin in glacial acetic acid, reaction at 100-120 deg.C for 1.5-4 hrs nuder existance of ethyl anhydride as catalyst,… Read More »