Patents Assigned to Boenringer Ingelheim International GmbH - Justia Patents Search

Patents Assigned to Boenringer Ingelheim International GmbH

Process for the preparation of (r)-8-(3-aminopiperidin-1-yl)-7-(but-2-yn-1-yl)-3-methyl-1-((4-methylquinazolin-2-yl)methyl)-3,7-dihydro-1h-purine-2,6-dione

Patent number: 10253026

Abstract: This invention relates to a method for preparation of a xanthine-based compound of formula (I): as well as to intermediates useful in such preparation.

Type: Grant

Filed: June 24, 2016

Date of Patent: April 9, 2019

Assignee: Boenringer Ingelheim International GmbH

Inventors: Weitong Dong, Yao Huang, Shengmin Su, Yongfen Sun, Pengtao Zhang