Nitrogen → 3-[1-(4,6-Difluoro-1-methyl-1H-indazol-5-yl)-ethyl]-6-(1-ethoxy-vinyl)-imidazo[1,2-b]pyridazine

HRID 1892390Notes

Reaction equation

Cl[C:2]1[CH:3]=[CH:4][C:5]2[N:6]([C:8]([CH:11]([C:13]3[C:14]([F:24])=[C:15]4[C:19](=[CH:20][C:21]=3[F:22])[N:18]([CH3:23])[N:17]=[CH:16]4)[CH3:12])=[CH:9][N:10]=2)[N:7]=1.C([Sn](CCCC)(CCCC)[C:30]([O:32][CH2:33][CH3:34])=[CH2:31])CCC.N#N>CN(C=O)C.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[F:24][C:14]1[C:13]([CH:11]([C:8]2[N:6]3[N:7]=[C:2]([C:30]([O:32][CH2:33][CH3:34])=[CH2:31])[CH:3]=[CH:4][C:5]3=[N:10][CH:9]=2)[CH3:12])=[C:21]([F:22])[CH:20]=[C:19]2[C:15]=1[CH:16]=[N:17][N:18]2[CH3:23]

Participants

Conditions

Temperature: 95 °C

Procedure

A solution of 6-chloro-3-[1-(4,6-difluoro-1-methyl-1H-indazol-5-yl)-ethyl]-imidazo[1,2-b]pyridazine (80 mg, 0.23 mmol) and tributyl(1-ethoxyvinyl)stannane (0.234 mL, 0.69 mmol) in 15 mL of DMF was purged with N2 for 30 min and then Pd(PPh3)4 (80 mg, 0.069 mmol) was added and the solution was heated at 95° C. overnight. After the reaction was complete, it was quenched with water, extracted with EtOAc three times. The organic layers were combined, washed with KF solution then brine, dried over Na2SO4. Solvent was evaporated and the crude (80 mg, 90%) was used in the next step without further purification. LCMS (method C): [MH]+=384.0, tR=4.67 min

Workup

customit was quenched with water
extractionextracted with EtOAc three times
washwashed with KF solution
dry with materialbrine, dried over Na2SO4
customSolvent was evaporated
customthe crude (80 mg, 90%) was used in the next step without further purification

Sources & evidence

ORD record: ord-fc964465a8394e20b16db11a1b10390f
Source dataset: uspto-grants-2013_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08507676B2

Reaction notes

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