The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 14, 2025
Filed:
Dec. 23, 2019
Applicant:
Hoffmann-la Roche Inc., Little Falls, NJ (US);
Inventors:
Weichun Chen, Shanghai, CN;
Guocai Zhang, Shanghai, CN;
Assignee:
Hoffmann-La Roche Inc., Little Falls, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 221/22 (2005.12);
U.S. Cl.
CPC ...
C07D 221/22 (2012.12);
Abstract
The present invention relates to a process for the preparation of a compound (I) or pharmaceutically acceptable salt thereof, which is useful as the key intermediate for the synthesis of compounds for prophylaxis and treatment of a disease associated with the deposition of β-amyloid in the brain, in particular Alzheimer's disease, and other diseases such as cerebral amyloid angiopathy, hereditary cerebral hemorrhage with amyloidosis, Dutch-type (HCHWA-D), multi-infarct dementia, dementia pugilistica and Down syndrome.