4-Aminotetrahydropyran → 6-[3-(3,4-Difluoro-phenyl)-5-hydroxymethyl-isoxazol-4-ylmethoxy]-N-(tetrahydro-pyran-4-yl)-nicotinamide

HRID 1514710Notes

Reaction equation

C[Al](C)C.[NH2:5][CH:6]1[CH2:11][CH2:10][O:9][CH2:8][CH2:7]1.C[O:13][C:14](=O)[C:15]1[CH:20]=[CH:19][C:18]([O:21][CH2:22][C:23]2[C:24]([C:30]3[CH:35]=[CH:34][C:33]([F:36])=[C:32]([F:37])[CH:31]=3)=[N:25][O:26][C:27]=2[CH2:28][OH:29])=[N:17][CH:16]=1>O1CCOCC1>[F:37][C:32]1[CH:31]=[C:30]([C:24]2[C:23]([CH2:22][O:21][C:18]3[CH:19]=[CH:20][C:15]([C:14]([NH:5][CH:6]4[CH2:11][CH2:10][O:9][CH2:8][CH2:7]4)=[O:13])=[CH:16][N:17]=3)=[C:27]([CH2:28][OH:29])[O:26][N:25]=2)[CH:35]=[CH:34][C:33]=1[F:36]

Participants

Conditions

Temperature: 85 °C

Procedure

A trimethylaluminium solution (2 M in toluene, 532 μL, 1.06 mmol) was added to a solution of 4-aminotetrahydropyran (111 mg, 1.06 mmol) in dioxane (5 mL). 6-[3-(3,4-Difluoro-phenyl)-5-hydroxymethyl-isoxazol-4-ylmethoxy]-nicotinic acid methyl ester (100 mg, 0.27 mmol) in dioxane (5 mL) was added after 1 h at 50° C. The reaction mixture was stirred at 85° C. overnight. Again trimethylaluminium solution (2 M in toluene, 500 μL, 1.0 mmol) was added and stirring was continued for 3 h at 85° C. The solvent was removed by distillation. The residue was purified by chromatography (silica, dichloromethane:methanol=100:0 to 95:5) to afford the title compound (60 mg, 50%) as a white solid. MS: m/e=446.4 [M+H]+.

Workup

stirringstirring
waitwas continued for 3 h at 85° C
customThe solvent was removed by distillation
customThe residue was purified by chromatography (silica, dichloromethane:methanol=100:0 to 95:5)

Sources & evidence

ORD record: ord-ff0a981212d540d08ae417980583692c
Source dataset: uspto-grants-2012_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08222246B2

Reaction notes

Loading…