Dimethylformamide → ethyl 1-[({5'-chloro-4-methyl-6'-[4-(trifluoromethyl)-1-{[2-(trimethylsilyl)ethoxy]-methyl}-1H-imidazol-2-yl]-3,3'-bipyridin-6-yl}oxy)methyl]cyclobutanecarboxylate

HRID 623918Notes

Reaction equation

CN(C)C=O.Br[C:7]1[CH:8]=[C:9]([Cl:30])[C:10]([C:13]2[N:14]([CH2:22][O:23][CH2:24][CH2:25][Si:26]([CH3:29])([CH3:28])[CH3:27])[CH:15]=[C:16]([C:18]([F:21])([F:20])[F:19])[N:17]=2)=[N:11][CH:12]=1.[CH3:31][C:32]1[C:37](B2OC(C)(C)C(C)(C)O2)=[CH:36][N:35]=[C:34]([O:47][CH2:48][C:49]2([C:53]([O:55][CH2:56][CH3:57])=[O:54])[CH2:52][CH2:51][CH2:50]2)[CH:33]=1.C(=O)([O-])[O-].[Na+].[Na+]>O>[Cl:30][C:9]1[CH:8]=[C:7]([C:37]2[CH:36]=[N:35][C:34]([O:47][CH2:48][C:49]3([C:53]([O:55][CH2:56][CH3:57])=[O:54])[CH2:52][CH2:51][CH2:50]3)=[CH:33][C:32]=2[CH3:31])[CH:12]=[N:11][C:10]=1[C:13]1[N:14]([CH2:22][O:23][CH2:24][CH2:25][Si:26]([CH3:29])([CH3:28])[CH3:27])[CH:15]=[C:16]([C:18]([F:21])([F:20])[F:19])[N:17]=1

Participants

Conditions

Temperature: 65 °C

Procedure

N,N-dimethylformamide (3 mL) was added to 5-bromo-3-chloro-2-[4-(trifluoromethyl)-1-{[2-(trimethylsilyl)ethoxy]methyl}-1H-imidazol-2-yl]pyridine (365 mg), ethyl 1-({[4-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl]-oxy}methyl)cyclobutanecarboxylate (300 mg) and palladium chloride (dppf) methylene chloride complex (33 mg), and after adding 2N aqueous sodium carbonate solution (1.2 mL) to the mixture, the atmosphere was replaced with nitrogen and the mixture was stirred at 65° C. for 2 hours. Water was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with a saturated brine, concentrated under reduced pressure and the obtained residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=100:0 to 90:10) to obtain ethyl 1-[({5′-chloro-4-methyl-6′-[4-(trifluoromethyl)-1-{[2-(trimethylsilyl)ethoxy]methyl}-1H-imidazol-2-yl]-3,3′-bipyridin-6-yl}oxy)methyl]cyclobutanecarboxylate (318 mg).

Workup

extractionthe mixture was extracted with ethyl acetate
washThe organic layer was washed with a saturated brine
concentrationconcentrated under reduced pressure
customthe obtained residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=100:0 to 90:10)

Sources & evidence

ORD record: ord-dae217b89e614e82bb625741f42c36ec
Source dataset: uspto-grants-2016_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09302996B2

Reaction notes

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