Ammonia → (S)-3-(8-(6-(2-methylpyrrolidin-1-yl)pyridin-2-ylamino)imidazo[1,2-b]pyridazin-6-yl)benzamide

HRID 1755367Notes

Reaction equation

HRID 1755367 reaction equation
[CH3:1][C@H:2]1[CH2:6][CH2:5][CH2:4][N:3]1[C:7]1[N:12]=[C:11]([NH:13][C:14]2[C:15]3[N:16]([CH:29]=[CH:30][N:31]=3)[N:17]=[C:18]([C:20]3[CH:21]=[C:22]([CH:26]=[CH:27][CH:28]=3)[C:23]([OH:25])=O)[CH:19]=2)[CH:10]=[CH:9][CH:8]=1.C1C=CC2N(O)N=[N:38]C=2C=1.CCN(CC)CC.CCN=C=NCCCN(C)C.N>ClCCl.O1CCOCC1>[CH3:1][C@H:2]1[CH2:6][CH2:5][CH2:4][N:3]1[C:7]1[N:12]=[C:11]([NH:13][C:14]2[C:15]3[N:16]([CH:29]=[CH:30][N:31]=3)[N:17]=[C:18]([C:20]3[CH:21]=[C:22]([CH:26]=[CH:27][CH:28]=3)[C:23]([NH2:38])=[O:25])[CH:19]=2)[CH:10]=[CH:9][CH:8]=1

Participants

8

Reactant 5

HCID 222AmmoniaHCID 8471TriethylamineHCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 71526081(S)-3-(8-(6-(2-methylpyrrolidin-1-yl)pyridin-2-ylamino)imidazo[1,2-b]pyridazin-6-yl)benzoic acid

Product 1

HCID 71526169(S)-3-(8-(6-(2-methylpyrrolidin-1-yl)pyridin-2-ylamino)imidazo[1,2-b]pyridazin-6-yl)benzamideYield 47.1%

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolventHCID 312751,4-DioxaneSolvent

Procedure

To a stirred solution of (S)-3-(8-(6-(2-methylpyrrolidin-1-yl)pyridin-2-ylamino)imidazo[1,2-b]pyridazin-6-yl)benzoic acid (76 mg, 0.195 mmol), HOBT (39 mg, 0.289 mmol), Et3N (39 mg, 0.786 mmol) and EDCI (55 mg, 0.289 mmol) in dichloromethane (20 mL) and dioxane (10 mL) was bubbled NH3 gas until saturation and the mixture stirred for 16 h at room temperature. The reaction mixture was filtered then the filtrate concentrated in vacuo. The residue was purified by chromatography (silica gel, 10 g, 200˜300 mesh, MeOH:dichloromethane=1:50) to afford (S)-3-(8-(6-(2-methylpyrrolidin-1-yl)pyridin-2-ylamino)imidazo[1,2-b]pyridazin-6-yl)benzamide (38 mg, 47%) as a yellow solid. 1H NMR (300 MHz, CD3OD): δ 8.93 (s, 1H), 8.47 (s, 1H), 8.14 (d, 1H, J=8.1 Hz), 8.03-7.97 (m, 2H), 7.63-7.58 (m, 2H), 7.44 (t, 1H, J=8.1 Hz), 6.30 (d, 1H, J=7.8 Hz), 6.09 (d, 1H, J=8.1 Hz), 4.32-4.22 (m, 1H), 3.69-3.61 (m, 1H), 3.48-3.42 (m, 1H), 2.17-2.01 (m, 3H), 1.68 (s, 1H), 1.17 (d, 3H, J=6.3 Hz). LC-MS: [M+H]+, 414, tR=1.594 min, HPLC: 100% at 214 nm, 100% at 254 nm, tR=4.417 min.

Workup

  1. filtrationThe reaction mixture was filtered
  2. concentrationthe filtrate concentrated in vacuo
  3. customThe residue was purified by chromatography (silica gel, 10 g, 200˜300 mesh, MeOH:dichloromethane=1:50)

Sources & evidence

ORD record
ord-8f4839eecc514e108493db2dfb3e59c0
Source dataset
uspto-grants-2015_10
Patent number
US09169259B2

Reaction notes

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