Triethylamine → tert-Butyl 4-(4-((4-((3-(2-ethoxy-2-oxoethyl)pyrazin-2-yl)ethynyl)-5-(trifluoromethyl)pyrimidin-2-yl)amino)phenyl)piperidine-1-carboxylate

HRID 1485236Notes

Reaction equation

HRID 1485236 reaction equation
Cl[C:2]1[C:7]([C:8]([F:11])([F:10])[F:9])=[CH:6][N:5]=[C:4]([NH:12][C:13]2[CH:18]=[CH:17][C:16]([CH:19]3[CH2:24][CH2:23][N:22]([C:25]([O:27][C:28]([CH3:31])([CH3:30])[CH3:29])=[O:26])[CH2:21][CH2:20]3)=[CH:15][CH:14]=2)[N:3]=1.[C:32]([C:34]1[C:35]([CH2:40][C:41]([O:43][CH2:44][CH3:45])=[O:42])=[N:36][CH:37]=[CH:38][N:39]=1)#[CH:33].C(N(CC)CC)C>Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.[Cu]I.CN(C=O)C>[CH2:44]([O:43][C:41](=[O:42])[CH2:40][C:35]1[C:34]([C:32]#[C:33][C:2]2[C:7]([C:8]([F:11])([F:10])[F:9])=[CH:6][N:5]=[C:4]([NH:12][C:13]3[CH:18]=[CH:17][C:16]([CH:19]4[CH2:24][CH2:23][N:22]([C:25]([O:27][C:28]([CH3:31])([CH3:30])[CH3:29])=[O:26])[CH2:21][CH2:20]4)=[CH:15][CH:14]=3)[N:3]=2)=[N:39][CH:38]=[CH:37][N:36]=1)[CH3:45]

Participants

7

Reactant 3

HCID 8471TriethylamineHCID 86675716Tert-butyl 4-(4-((4-chloro-5-(trifluoromethyl)pyrimidin-2-yl)amino)phenyl)piperidine-1-carboxylateHCID 86675726Ethyl 2-(3-ethynylpyrazin-2-yl)acetate

Product 1

HCID 71229654tert-Butyl 4-(4-((4-((3-(2-ethoxy-2-oxoethyl)pyrazin-2-yl)ethynyl)-5-(trifluoromethyl)pyrimidin-2-yl)amino)phenyl)piperidine-1-carboxylateYield 52%

Reagents, catalysts & solvents 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418476HCID 178418476, compoundCatalystHCID 6228DimethylformamideSolvent

Conditions

Temperature
120 °C

Procedure

tert-Butyl 4-(4-((4-chloro-5-(trifluoromethyl)pyrimidin-2-yl)amino)phenyl)piperidine-1-carboxylate (I43) (140 mg, 0.306 mmol), ethyl 2-(3-ethynylpyrazin-2-yl)acetate (I101) (64 mg, 0.34 mmol), bis(triphenylphosphine)palladium(II) chloride (11 mg, 5 mol %) and DMF (2 mL) were loaded into a microwave tube and degassed with a nitrogen for ten minutes. Copper(I) iodide (3 mg, 5 mol %) and triethylamine (0.192 mL, 1.38 mmol) were added under nitrogen and the resulting mixture heated under microwave irradiation (120° C./15 minutes). The cooled mixture was concentrated, and the residue evaporated onto silica gel. Chromatography (12 g silica cartridge, 0-100% ethyl acetate/petroleum benzine 40-60° C.) gave the title compound (I102) (95.5 mg, 52% yield) as a yellow solid; 1H NMR (400 MHz, d6-DMSO) δ 10.47 (s, 1H), 8.87 (d, J=0.5 Hz, 1H), 8.76-8.71 (m, 2H), 7.63 (d, J=8.6 Hz, 2H), 7.23 (d, J=8.6 Hz, 2H), 4.15-3.99 (m, 6H), 2.80 (s, 2H), 2.70-2.63 (m, 1H), 1.80-1.70 (m, 2H), 1.55-1.44 (m, 2H), 1.42 (s, 9H), 1.14 (t, J=7.1 Hz, 3H). LCMS Method C: rt 6.73 min; m/z 633.1 [M+Na]+, 555.0 [M-tBu+2H]+, 511.1 [M-Boc+2H]+; m/z 609.1 [M−H]−.

Workup

  1. customdegassed with a nitrogen for ten minutes
  2. concentrationThe cooled mixture was concentrated
  3. customthe residue evaporated onto silica gel

Sources & evidence

ORD record
ord-97ac2d41b6e24a7c898690083608743a
Source dataset
uspto-grants-2016_08
Patent number
US09421205B2

Reaction notes

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