1,2-Dimethoxyethane → tert-Butyl 4-(3-(3-methyl-1-((6-methylpyridin-2-yl)methyl)-1H-indazol-4-ylcarbamoyl)imidazo[1,2-a]pyridin-7-yl)-5,6-dihydropyridine-1(2H)-carboxylate

HRID 706594Notes

Reaction equation

HRID 706594 reaction equation
Br[C:2]1[CH:7]=[CH:6][N:5]2[C:8]([C:11]([NH:13][C:14]3[CH:22]=[CH:21][CH:20]=[C:19]4[C:15]=3[C:16]([CH3:31])=[N:17][N:18]4[CH2:23][C:24]3[CH:29]=[CH:28][CH:27]=[C:26]([CH3:30])[N:25]=3)=[O:12])=[CH:9][N:10]=[C:4]2[CH:3]=1.COCCOC.CC1(C)C(C)(C)OB([C:46]2[CH2:51][CH2:50][N:49]([C:52]([O:54][C:55]([CH3:58])([CH3:57])[CH3:56])=[O:53])[CH2:48][CH:47]=2)O1.C(=O)([O-])[O-].[Na+].[Na+]>C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2].CN(C=O)C>[CH3:31][C:16]1[C:15]2[C:19](=[CH:20][CH:21]=[CH:22][C:14]=2[NH:13][C:11]([C:8]2[N:5]3[CH:6]=[CH:7][C:2]([C:46]4[CH2:51][CH2:50][N:49]([C:52]([O:54][C:55]([CH3:58])([CH3:57])[CH3:56])=[O:53])[CH2:48][CH:47]=4)=[CH:3][C:4]3=[N:10][CH:9]=2)=[O:12])[N:18]([CH2:23][C:24]2[CH:29]=[CH:28][CH:27]=[C:26]([CH3:30])[N:25]=2)[N:17]=1

Participants

7

Reactant 4

HCID 80711,2-DimethoxyethaneHCID 10340Sodium CarbonateHCID 4642098Tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1,2,3,6-tetrahydropyridine-1-carboxylateHCID 679764107-bromo-N-(3-methyl-1-((6-methylpyridin-2-yl)methyl)-1H-indazol-4-yl)imidazo[1,2-a]pyridine-3-carboxamide

Product 1

HCID 67976365tert-Butyl 4-(3-(3-methyl-1-((6-methylpyridin-2-yl)methyl)-1H-indazol-4-ylcarbamoyl)imidazo[1,2-a]pyridin-7-yl)-5,6-dihydropyridine-1(2H)-carboxylate

Reagents, catalysts & solvents 2

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)CatalystHCID 6228DimethylformamideSolvent

Conditions

Temperature
90 °C

Procedure

7-Bromo-N-(3-methyl-1-((6-methylpyridin-2-yl)methyl)-1H-indazol-4-yl)imidazo[1,2-a]pyridine-3-carboxamide (Example 50, Steps A-B; 0.0815 g, 0.171 mmol) was dissolved in 2 mL of 1:1 (DME:DMF). To this was added tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-5,6-dihydropyridine-1(2H)-carboxylate (0.0795 g, 0.257 mmol), Pd(dppf)Cl2 (5 mol %), and 2M aqueous sodium carbonate (256 μL, 0.513 mmol). Nitrogen was bubbled through the solution for 5 minutes and the reaction mixture was then heated to 90° C. for 16 hours. The reaction mixture was then diluted with EtOAc and the precipitate formed was filtered and the filtrate was washed with water and brine, dried over sodium sulfate and concentrated under reduced pressure. The crude material was purified by reverse phase chromatography to provided tert-butyl 4-(3-(3-methyl-1-((6-methylpyridin-2-yl)methyl)-1H-indazol-4-ylcarbamoyl)imidazo[1,2-a]pyridin-7-yl)-5,6-dihydropyridine-1-(2H)-carboxylate, which was treated 4M HCl/dioxane to give the title product. MS (APCI), positive scan, m/z=478.2 (M+H).

Workup

  1. customNitrogen was bubbled through the solution for 5 minutes
  2. additionThe reaction mixture was then diluted with EtOAc
  3. customthe precipitate formed
  4. filtrationwas filtered
  5. washthe filtrate was washed with water and brine
  6. dry with materialdried over sodium sulfate
  7. concentrationconcentrated under reduced pressure
  8. customThe crude material was purified by reverse phase chromatography

Sources & evidence

ORD record
ord-64889e69b86e4cc1ad72135eb3b361dd
Source dataset
uspto-grants-2015_11
Patent number
US09174981B2

Reaction notes

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