Sodium Carbonate → 6-(3-methoxyphenyl)-N-(6-(2-methylpyrrolidin-1-yl)pyridin-2-yl)imidazo[1,2-b]pyridazin-8-amine

HRID 1755353Notes

Reaction equation

HRID 1755353 reaction equation
Cl[C:2]1[CH:3]=[C:4]([NH:11][C:12]2[CH:17]=[CH:16][CH:15]=[C:14]([N:18]3[CH2:22][CH2:21][CH2:20][CH:19]3[CH3:23])[N:13]=2)[C:5]2[N:6]([CH:8]=[CH:9][N:10]=2)[N:7]=1.[CH3:24][O:25][C:26]1[CH:27]=[C:28](B(O)O)[CH:29]=[CH:30][CH:31]=1.CC(C1C=C(C(C)C)C(C2C=CC=CC=2P(C2CCCCC2)C2CCCCC2)=C(C(C)C)C=1)C.C([O-])([O-])=O.[Na+].[Na+]>O1CCOCC1.O.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]>[CH3:24][O:25][C:26]1[CH:31]=[C:30]([C:2]2[CH:3]=[C:4]([NH:11][C:12]3[CH:17]=[CH:16][CH:15]=[C:14]([N:18]4[CH2:22][CH2:21][CH2:20][CH:19]4[CH3:23])[N:13]=3)[C:5]3[N:6]([CH:8]=[CH:9][N:10]=3)[N:7]=2)[CH:29]=[CH:28][CH:27]=1

Participants

8

Reactant 4

HCID 10340Sodium CarbonateHCID 2734370(3-Methoxyphenyl)boronic acidHCID 111557942-Dicyclohexylphosphino-2',4',6'-triisoprophylbiphenylHCID 715343846-chloro-N-(6-(2-methylpyrrolidin-1-yl)pyridin-2-yl)imidazo[1,2-b]pyridazin-8-amine

Product 1

HCID 715259866-(3-methoxyphenyl)-N-(6-(2-methylpyrrolidin-1-yl)pyridin-2-yl)imidazo[1,2-b]pyridazin-8-amineYield 41.1%

Reagents, catalysts & solvents 3

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 962WaterSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
100 °C

Procedure

A mixture of 6-chloro-N-(6-(2-methylpyrrolidin-1-yl)pyridin-2-yl)imidazo[1,2-b]pyridazin-8-amine (0.05 g, 0.152 mmol), 3-methoxyphenylboronic acid (0.025 g, 0.167 mmol), Pd2(dba)3 (0.017 g, 0.03 mmol), X-phos (0.029 g, 0.06 mmol) and Na2CO3 (0.048 g, 0.456 mmol) in dioxane (20 mL) and water (5 mL) was heated to 100° C. for 16 h in a sealed tube under N2 atmosphere then concentrated in vacuo. The residue was purified by chromatography (silica gel, 10 g, 200˜300 mesh, ethyl acetate:petroleum ether=1:10) to afford 6-(3-methoxyphenyl)-N-(6-(2-methylpyrrolidin-1-yl)pyridin-2-yl)imidazo[1,2-b]pyridazin-8-amine (25 mg, 41%) as a yellow solid. 1H NMR (300 MHz, CD3OD): δ 8.76 (s, 1H), 7.95 (s, 1H), 7.56 (s, 1H), 7.47-7.32 (m, 4 h), 7.03-6.99 (m, 1H), 6.23 (d, 1H, J=7.5 Hz), 6.03 (d, 1H, J=8.4 Hz), 4.25-4.21 (m, 1H), 3.86 (s, 3H), 3.62-3.56 (m, 1H), 3.44-3.35 (m, 1H), 2.17-1.99 (m, 3H), 1.74-1.71 (m, 1H), 1.17 (d, 3H, J=6.3 Hz). LC-MS: [M+H]+, 401, tR=1.961 min, HPLC: 95.06% at 214 nm, 98.71% at 254 nm, tR=7.643 min.

Workup

  1. concentrationthen concentrated in vacuo
  2. customThe residue was purified by chromatography (silica gel, 10 g, 200˜300 mesh, ethyl acetate:petroleum ether=1:10)

Sources & evidence

ORD record
ord-54512cbe835b48edb5c4a81688ea86ba
Source dataset
uspto-grants-2015_10
Patent number
US09169259B2

Reaction notes

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