Dichloromethane → Propanenitrile, 3-[[4-[1-(2,2-difluoroethyl)-3-(1H-pyrrolo[2,3-b]pyridin-5-yl)-1H-pyrazol-4-yl]-2-pyriMidinyl]aMino]-

HRID 500734Notes

Reaction equation

CC1(C)C(C)(C)OB([C:9]2[CH:10]=[C:11]3[CH:17]=[CH:16][NH:15][C:12]3=[N:13][CH:14]=2)O1.BrC1C=C2C=CNC2=NC=1.[F:29][CH:30]([F:49])[CH2:31][N:32]1[CH:36]=[C:35]([C:37]2[CH:42]=[CH:41][N:40]=[C:39]([NH:43][CH2:44][CH2:45][C:46]#[N:47])[N:38]=2)[C:34](I)=[N:33]1.[F-].[Cs+].ClCCl>COCCOC.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2]>[F:49][CH:30]([F:29])[CH2:31][N:32]1[CH:36]=[C:35]([C:37]2[CH:42]=[CH:41][N:40]=[C:39]([NH:43][CH2:44][CH2:45][C:46]#[N:47])[N:38]=2)[C:34]([C:9]2[CH:10]=[C:11]3[CH:17]=[CH:16][NH:15][C:12]3=[N:13][CH:14]=2)=[N:33]1

Participants

Conditions

Temperature: 80 °C

Procedure

A mixture of the 5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrrolo[2,3-b]pyridine B-33-4, which was prepared from 5-bromo-1H-pyrrolo[2,3-b]pyridine according to known literature methods, (145 mg, 0.594 mmol), 3-({4-[1-(2,2-difluoroethyl)-3-iodo-1H-pyrazol-4-yl]pyrimidin-2-yl}amino)propanenitrile (200 mg, 0.495 mmol), and cesium fluoride (1.48 mL of a 1M aqueous solution) in 3 mL of DME was deoxygenated with a nitrogen bubbler for 5 min and then [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) 1:1 complex with dichloromethane (41 mg, 0.05 mmol) was added. The mixture was then heated in a microwave reactor at 80° C. for 2.5 hours. The reaction was degassed and fresh catalyst (20 mg) was added. The mixture was heated in the microwave at 80° C. for 4 more hours. The resulting dark mixture was partitioned between ethyl acetate and brine. The aqueous layer was extracted twice with ethyl acetate. The combined organics were washed with brine, dried over Magnesium sulfate and reduced to minimum volume. The residue was purified on silica gel using a gradient of 0-8% methanol (containing 10% ammonium hydroxide) in a mixture of tert-butyl methyl ether and dichloromethane (1:1) to give the desired product as a pale orange solid. This material was triturated twice with tert-butyl methyl ether to give 82 mg (42%) of analytically pure 3-({4-[1-(2,2-difluoroethyl)-3-(1H-pyrrolo[2,3-b]pyridin-5-yl)-1H-pyrazol-4-yl]pyrimidin-2-yl}amino)propanenitrile as an off white solid. 1H NMR (400 MHz, ACETONITRILE-d3) δ ppm 9.73 (br. s., 1H), 8.37 (d, J=2.02 Hz, 1H), 8.22 (s, 1H), 8.10 (d, J=5.31 Hz, 1H), 8.08 (d, J=1.52 Hz, 1H), 7.35-7.46 (m, 1H), 6.54 (d, J=3.79 Hz, 1H), 6.51 (dd, J=3.54, 2.02 Hz, 1H), 6.30 (tt, J=55.04, 3.82 Hz, 1H), 5.91 (br. t, J=6.82 Hz, 1H), 4.62 (td, J=14.65, 3.79 Hz, 2H), 3.39 (br. s., 2H), 2.40 (br. s., 2H).

Workup

customwas deoxygenated with a nitrogen bubbler for 5 min
customThe reaction was degassed
additionfresh catalyst (20 mg) was added
temperatureThe mixture was heated in the microwave at 80° C. for 4 more hours
customThe resulting dark mixture was partitioned between ethyl acetate and brine
extractionThe aqueous layer was extracted twice with ethyl acetate
washThe combined organics were washed with brine
dry with materialdried over Magnesium sulfate
customThe residue was purified on silica gel using a gradient of 0-8% methanol (containing 10% ammonium hydroxide)
additionin a mixture of tert-butyl methyl ether and dichloromethane (1:1)

Sources & evidence

ORD record: ord-f0ccbbc2c8ad4a0d8665ee1c82edae29
Source dataset: uspto-grants-2010_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07772246B2

Reaction notes

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