Cesium carbonate → (R)-methyl 3-(8-(6-(2-methylpyrrolidin-1-yl)pyridine-2-ylamino)imidazo[1,2-b]pyridazin-6-yl)benzoate

HRID 1755324Notes

Reaction equation

Br[C:2]1[C:3]2[N:4]([CH:18]=[CH:19][N:20]=2)[N:5]=[C:6]([C:8]2[CH:9]=[C:10]([CH:15]=[CH:16][CH:17]=2)[C:11]([O:13][CH3:14])=[O:12])[CH:7]=1.[CH3:21][C@@H:22]1[CH2:26][CH2:25][CH2:24][N:23]1[C:27]1[N:32]=[C:31]([NH2:33])[CH:30]=[CH:29][CH:28]=1.C1C=CC(P(C2C(C3C(P(C4C=CC=CC=4)C4C=CC=CC=4)=CC=C4C=3C=CC=C4)=C3C(C=CC=C3)=CC=2)C2C=CC=CC=2)=CC=1.C([O-])([O-])=O.[Cs+].[Cs+]>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].O1CCOCC1>[CH3:21][C@@H:22]1[CH2:26][CH2:25][CH2:24][N:23]1[C:27]1[N:32]=[C:31]([NH:33][C:2]2[C:3]3[N:4]([CH:18]=[CH:19][N:20]=3)[N:5]=[C:6]([C:8]3[CH:9]=[C:10]([CH:15]=[CH:16][CH:17]=3)[C:11]([O:13][CH3:14])=[O:12])[CH:7]=2)[CH:30]=[CH:29][CH:28]=1

Participants

Conditions

Temperature: 100 °C

Procedure

A mixture of methyl 3-(8-bromoimidazo[1,2-b]pyridazin-6-yl)benzoate (200 mg, 0.6 mmol), (R)-6-(2-methylpyrrolidin-1-yl)pyridin-2-amine (160 mg, 0.9 mmol), Pd2(dba)3 (36 mg, 0.06 mmol), BINAP (152 mg, 0.24 mmol), Cs2CO3 (592 mg, 1.8 mmol) and dioxane (10 mL) was heated to 100° C. with stirring for 16 h under N2. The solvent was removed in vacuo and the resulting mixture was purified by chromatography (silica gel, 200-300 mesh, petroleum ether:ethyl acetate=3:1) to give (R)-methyl 3-(8-(6-(2-methylpyrrolidin-1-yl)pyridine-2-ylamino)imidazo[1,2-b]pyridazin-6-yl)benzoate (110 mg, 43%) as a yellow solid. LC-MS: [M+H]+, 429.1, tR=2.064 min.

Workup

customThe solvent was removed in vacuo
customthe resulting mixture was purified by chromatography (silica gel, 200-300 mesh, petroleum ether:ethyl acetate=3:1)

Sources & evidence

ORD record: ord-64ebdcd0275b4da6ad48715a51eb07b5
Source dataset: uspto-grants-2015_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09169259B2

Reaction notes

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