1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → 3-(8-(5,6-dimethoxypyridin-2-ylamino)imidazo[1,2-b]pyridazin-6-yl)-N-(4-(methylcarbamoyl)phenyl)benzamide

HRID 1755433Notes

Reaction equation

HRID 1755433 reaction equation
[CH3:1][O:2][C:3]1[CH:4]=[CH:5][C:6]([NH:11][C:12]2[C:13]3[N:14]([CH:27]=[CH:28][N:29]=3)[N:15]=[C:16]([C:18]3[CH:19]=[C:20]([CH:24]=[CH:25][CH:26]=3)[C:21](O)=[O:22])[CH:17]=2)=[N:7][C:8]=1[O:9][CH3:10].C1C=CC2N(O)N=NC=2C=1.CCN=C=NCCCN(C)C.CCN(C(C)C)C(C)C.[NH2:60][C:61]1[CH:70]=[CH:69][C:64]([C:65]([NH:67][CH3:68])=[O:66])=[CH:63][CH:62]=1>CN(C=O)C>[CH3:1][O:2][C:3]1[CH:4]=[CH:5][C:6]([NH:11][C:12]2[C:13]3[N:14]([CH:27]=[CH:28][N:29]=3)[N:15]=[C:16]([C:18]3[CH:19]=[C:20]([CH:24]=[CH:25][CH:26]=3)[C:21]([NH:60][C:61]3[CH:62]=[CH:63][C:64]([C:65](=[O:66])[NH:67][CH3:68])=[CH:69][CH:70]=3)=[O:22])[CH:17]=2)=[N:7][C:8]=1[O:9][CH3:10]

Participants

7

Reactant 5

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 81531DiisopropylethylamineHCID 2355164-Amino-N-methylbenzamideHCID 715343363-(8-(5,6-Dimethoxypyridin-2-ylamino)imidazo[1,2-b]pyridazin-6-yl)benzoic acid

Product 1

HCID 715253603-(8-(5,6-dimethoxypyridin-2-ylamino)imidazo[1,2-b]pyridazin-6-yl)-N-(4-(methylcarbamoyl)phenyl)benzamideYield 28.4%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

3-(8-(5,6-Dimethoxypyridin-2-ylamino)imidazo[1,2-b]pyridazin-6-yl)benzoic acid (58 mg, 148 μmol), HOBt (34.0 mg, 222 μmol) and EDCI (42.6 mg, 222 μmol) were combined with DMF (10 mL) to give a light yellow suspension. After 1 h, a clear yellow solution had been generated. DIPEA (47.9 mg, 64.7 μL, 370 μmol) and 4-amino-N-methylbenzamide (31.2 mg, 207 μmol) were added. After 15 h the mixture was concentrated in vacuo then diluted with water (10 mL) and filtered. The collected solid was washed with water (3×3 mL) and dried in vacuo. Purification by chromatography (silica, 50 g, Supelco VersaFlash, 0-5% methanol in dichloromethane, gradient over 15 min) gave a residue that was recrystallized from methanol to give 3-(8-(5,6-dimethoxypyridin-2-ylamino)imidazo[1,2-b]pyridazin-6-yl)-N-(4-(methylcarbamoyl)phenyl)benzamide (22 mg, 42.0 μmol, 28%) as an off-white powder. 1H NMR (300 MHz, DMSO-d6) δ ppm 10.60 (s, 1H) 9.98 (s, 1H) 8.62 (s, 1H) 8.53 (s, 1H) 8.36 (d, J=4.91 Hz, 1H) 8.16-8.27 (m, 2H) 8.10 (d, J=7.93 Hz, 1H) 7.87 (d, J=1.51 Hz, 4H) 7.61-7.76 (m, 2H) 7.42 (d, J=8.31 Hz, 1H) 7.13 (d, J=8.31 Hz, 1H) 4.03 (s, 3H) 3.77 (s, 3H) 2.79 (d, J=4.53 Hz, 3H); LC/MS: 524.1 [MH]+.

Workup

  1. customto give a light yellow suspension
  2. concentrationAfter 15 h the mixture was concentrated in vacuo
  3. additionthen diluted with water (10 mL)
  4. filtrationfiltered
  5. washThe collected solid was washed with water (3×3 mL)
  6. customdried in vacuo
  7. customPurification by chromatography (silica, 50 g, Supelco VersaFlash, 0-5% methanol in dichloromethane, gradient over 15 min)
  8. customgave a residue that
  9. customwas recrystallized from methanol

Sources & evidence

ORD record
ord-4070d6c4856c40278b9024b83a50d3b2
Source dataset
uspto-grants-2015_10
Patent number
US09169259B2

Reaction notes

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