专利检索 ap:("AMPAC Fine Chemicals LLC") AND inv:"Alec Brozell" 第 1 页

1.

发明授权
Methods for preparing levorphanol and related compounds, and compositions thereof 有权

公开(公告)号：US10851063B2

公开(公告)日：2020-12-01

申请号：US16151798

申请日：2018-10-04

申请人： AMPAC Fine Chemicals LLC

发明人： William Dubay , Alex Nichols , Wei Chen , Alec Brozell , Ajay Ryerson

IPC分类号： C07D221/28 , C07C59/255

摘要： A method for producing substantially pure levorphanol and related compounds, when compared to the conventional process, is provided. In particular, a method for producing substantially pure levorphanol tartrate dihydrate is described. Also described are compositions comprising levorphanol and related compounds, particularly compositions comprising levorphanol tartrate dihydrate, levomethorphan, and norlevorphanol in which the levomethorphan and norlevorphanol are present in the composition in reduced levels.