US Patent No. 9,744,173

2-AMINO 6-METHYL-4,4A,5,6-TETRAHYDROPYRANO[3,4-D][1,3]THIAZIN-8A(8H)-YL-1,3-THIAZOL-4-YL AMIDES


Patent No. 9,744,173
Issue Date August 29, 2017
Title 2-amino 6-methyl-4,4a,5,6-tetrahydropyrano[3,4-d][1,3]thiazin-8a(8h)-yl-1,3-thiazol-4-yl Amides
Inventorship Michael Aaron Brodney, Newton, MA (US)
Elizabeth Mary Beck, Edinburgh (GB)
Christopher Ryan Butler, Canton, MA (US)
Lei Zhang, Auburndale, MA (US)
Erik Alphie LaChapelle, Uncasville, CT (US)
Bruce Nelsen Rogers, Belmont, MA (US)
Assignee Pfizer Inc., New York, NY (US)

Claim of US Patent No. 9,744,173

1. A method of treating Alzheimer's disease in a patient, the method comprising administering to the patient a therapeutically
effective amount of a compound selected from the group consisting of
N-{2-[(4aR,6S,8aR)-2-Amino-6-methyl-4,4a,5,6-tetrahydropyrano [3,4-d][1,3]thiazin-8a(8H)-yl]-1,3-thiazol-4-yl}-5-(difluoromethoxy)pyridine-2-carboxamide;
N-{2-[(4aR,6S,8aR)-2-Amino-6-methyl-4,4a,5,6-tetrahydropyrano[3,4-d][1,3]thiazin-8a(8H)-yl]-1,3-thiazol-4-yl}-5-(difluoromethoxy)
pyrazine-2-carboxamide;

N-{2-[(4aR,6S,8aR)-2-Amino-6-methyl-4,4a, 5,6-tetrahydropyrano[3,4-d][1,3]thiazin-8a(8H)-yl]-1,3-thiazol-4-yl}-5-chloropyridine-2-carboxamide;
N-{2-[(4aR,6S,8aR)-2-amino-6-methyl-4,4a,5,6-tetrahydropyrano[3,4-d][1,3]thiazin-8a(8H)-yl]-1,3-thiazol-4-yl}-5-fluoropyridine-2-carboxamide;
N-{2-[(4aR,6S,8aR)-2-amino-6-methyl-4,4a,5,6-tetrahydropyrano[3,4-d][1,3]thiazin-8a(8H)-yl]-1,3-thiazol-4-yl}-5-(difluoromethoxy)-3-methylpyridine-2-carboxamide;
N-{2-[(4aR,6S,8aR)-2-amino-6-methyl-4,4a,5,6-tetrahydropyrano[3,4-d][1,3]thiazin-8a(8H)-yl]-1,3-thiazol-4-yl}-5-(difluoromethoxy)-3-methylpyrazine-2-carboxamide;
and

N-{2-[(4aR,6S,8aR)-2-amino-6-methyl-4,4a,5,6-tetrahydropyrano[3,4-d][1,3]thiazin-8a(8H)-yl]-1,3-thiazol-4-yl}-3-chloro-5-(difluoromethoxy)pyridine-2-carboxamide;
or a tautomer thereof or a pharmaceutically acceptable salt of said compound or tautomer.