Triethylamine → (Z)-7-(2-ethoxyvinyl)-N-(3-methyl-1-((6-methylpyridin-2-yl)methyl)-1H-indazol-4-yl)imidazo[1,2-a]pyridine-3-carboxamide

HRID 706633Notes

Reaction equation

HRID 706633 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.CC1C(P(C2C(C)=CC=CC=2)C2C(C)=CC=CC=2)=CC=CC=1.C([Sn](CCCC)(CCCC)/[CH:59]=[CH:60]\[O:61][CH2:62][CH3:63])CCC.C(N(CC)CC)C>C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd].CN(C=O)C>[CH2:62]([O:61]/[CH:60]=[CH:59]\[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)[CH3:63]

Participants

7

Reactant 4

HCID 8471TriethylamineHCID 80271Tri-o-tolylphosphineHCID 5706773cis-1-Ethoxy-2-(tri-n-butylstannyl)ethyleneHCID 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 86699333(Z)-7-(2-ethoxyvinyl)-N-(3-methyl-1-((6-methylpyridin-2-yl)methyl)-1H-indazol-4-yl)imidazo[1,2-a]pyridine-3-carboxamideYield 84.5%

Reagents, catalysts & solvents 2

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 6228DimethylformamideSolvent

Conditions

Temperature
100 °C

Procedure

A flask was charged with 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; 100 mg, 0.21 mmol), tri-O-tolylphosphine (12.8 mg, 0.042 mmol) and tris(dibenzylideneacetone)dipalladium (19.3 mg, 0.021 mmol). To the flask was added DMF (3 mL), followed by (Z)-tributyl(2-ethoxyvinyl)stannane (114 mg, 0.316 mmol) and triethylamine (0.04 mL, 0.30 mmol). The reaction mixture was degassed under nitrogen, and stirred at 100° C. for 10 hours. The reaction mixture was cooled, diluted with water, and extracted with DCM and EtOAc. The combined organic extracts were dried over anhydrous sodium sulfate and concentrated. The crude product was subjected to preparative thin-layer chromatography on silica with 5% MeOH/DCM as eluent to afford 82.8 mg of product as a yellow solid.

Workup

  1. customThe reaction mixture was degassed under nitrogen
  2. temperatureThe reaction mixture was cooled
  3. additiondiluted with water
  4. extractionextracted with DCM and EtOAc
  5. dry with materialThe combined organic extracts were dried over anhydrous sodium sulfate
  6. concentrationconcentrated

Sources & evidence

ORD record
ord-374f13cb84804131a2b662fbc15698af
Source dataset
uspto-grants-2015_11
Patent number
US09174981B2

Reaction notes

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