Sodium Hydroxide → 8-(2-Fluoro-4-iodo-phenylamino)-imidazo[1,5-a]pyridine-7-carboxylic acid (2-vinyloxy-ethoxy)-amide

HRID 2067019Notes

Reaction equation

HRID 2067019 reaction equation
CO[C:3]([C:5]1[CH:10]=[CH:9][N:8]2[CH:11]=[N:12][CH:13]=[C:7]2[C:6]=1[NH:14][C:15]1[CH:20]=[CH:19][C:18]([I:21])=[CH:17][C:16]=1[F:22])=[O:4].[OH-].[Na+].[CH:25]([O:27][CH2:28][CH2:29][O:30][NH2:31])=[CH2:26].CCN=C=NCCCN(C)C.C1C=CC2N(O)N=NC=2C=1>C(OCC)(=O)C>[CH:25]([O:27][CH2:28][CH2:29][O:30][NH:31][C:3]([C:5]1[CH:10]=[CH:9][N:8]2[CH:11]=[N:12][CH:13]=[C:7]2[C:6]=1[NH:14][C:15]1[CH:20]=[CH:19][C:18]([I:21])=[CH:17][C:16]=1[F:22])=[O:4])=[CH2:26]

Participants

7

Reactant 5

HCID 14798Sodium HydroxideHCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 21867017O-(2-(Vinyloxy)ethyl)hydroxylamineHCID 595652128-(2-Fluoro-4-iodo-phenylamino)-imidazo[1,5-a]pyridine-7-carboxylic acid methyl ester

Product 1

HCID 595651978-(2-Fluoro-4-iodo-phenylamino)-imidazo[1,5-a]pyridine-7-carboxylic acid (2-vinyloxy-ethoxy)-amideYield 64%

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Conditions

Temperature
65 °C

Procedure

To a solution of 8-(2-fluoro-4-iodo-phenylamino)-imidazo[1,5-a]pyridine-7-carboxylic acid methyl ester (200 mg, 0.49 mmol) in IMS (10 mL) was added a 1.0 M aqueous solution of sodium hydroxide (1.0 mL, 1.0 mmol). The reaction mixture was heated at 65° C. for 2 hours and then cooled to room temperature and concentrated in vacuo. The resulting residue was azeotroped with toluene, and then suspended in THF (10 mL). O-(2-Vinyloxy-ethyl)-hydroxylamine (103 mg, 1.0 mmol), N-N-diisopropylethylamine (0.34 mL, 1.96 mmol), EDCI (192 mg, 1.0 mmol) and HOBt (135 mg, 1.0 mmol) were then added sequentially before the reaction mixture was stirred 18 hours at room temperature. The reaction mixture was then diluted with ethyl acetate and washed with water followed by a saturated aqueous solution of sodium bicarbonate and then brine, dried (Na2SO4), filtered and concentrated in vacuo. The resultant residue was subjected to flash chromatography (Si-PPC, gradient 0% to 100%, ethyl acetate in dichloromethane) to afford the title compound as a pale yellow oil (151 mg, 64%). LCMS (method B): RT=3.05 min, [M+H]+=483.

Workup

  1. temperaturecooled to room temperature
  2. concentrationconcentrated in vacuo
  3. customThe resulting residue was azeotroped with toluene
  4. washwashed with water
  5. dry with materialbrine, dried (Na2SO4)
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-bfce6d3a835f4d05b811392f24123007
Source dataset
uspto-grants-2012_10
Patent number
US08293763B2

Reaction notes

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