Triethylamine → tert-Butyl 4-(4-((4-((2-(2-methoxy-2-oxoethyl)phenyl)ethynyl)-5-(trifluoromethyl)pyrimidin-2-yl)amino)phenyl)piperazine-1-carboxylate

HRID 1485134Notes

Reaction equation

HRID 1485134 reaction equation
[C:1]([C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][C:4]=1[CH2:9][C:10]([O:12][CH3:13])=[O:11])#[CH:2].C(N(CC)CC)C.Cl[C:22]1[C:27]([C:28]([F:31])([F:30])[F:29])=[CH:26][N:25]=[C:24]([NH:32][C:33]2[CH:38]=[CH:37][C:36]([N:39]3[CH2:44][CH2:43][N:42]([C:45]([O:47][C:48]([CH3:51])([CH3:50])[CH3:49])=[O:46])[CH2:41][CH2:40]3)=[CH:35][CH:34]=2)[N:23]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>CN(C=O)C.[Cu]I>[CH3:13][O:12][C:10](=[O:11])[CH2:9][C:4]1[CH:5]=[CH:6][CH:7]=[CH:8][C:3]=1[C:1]#[C:2][C:26]1[C:27]([C:28]([F:30])([F:29])[F:31])=[CH:22][N:23]=[C:24]([NH:32][C:33]2[CH:34]=[CH:35][C:36]([N:39]3[CH2:40][CH2:41][N:42]([C:45]([O:47][C:48]([CH3:51])([CH3:50])[CH3:49])=[O:46])[CH2:43][CH2:44]3)=[CH:37][CH:38]=2)[N:25]=1

Participants

7

Reactant 4

HCID 8471TriethylamineHCID 11776TriphenylphosphineHCID 45789861Methyl 2-(2-ethynylphenyl)acetateHCID 86675713Tert-butyl 4-(4-((4-chloro-5-(trifluoromethyl)pyrimidin-2-yl)amino)phenyl)piperazine-1-carboxylate

Product 1

HCID 71229924tert-Butyl 4-(4-((4-((2-(2-methoxy-2-oxoethyl)phenyl)ethynyl)-5-(trifluoromethyl)pyrimidin-2-yl)amino)phenyl)piperazine-1-carboxylateYield 89%

Reagents, catalysts & solvents 2

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

Conditions

Temperature
120 °C

Procedure

To a nitrogen de-gassed solution of methyl 2-(2-ethynylphenyl)acetate (14: prepared according to the procedure of Peng, C. et al; Adv. Synth. Catal. 2008, 350, 2359-2364 or as detailed below) (0.114 g, 0.653 mmol) in dry DMF (6 mL) were added triethylamine (0.280 mL, 2.01 mmol) followed by tert-butyl 4-(4-((4-chloro-5-(trifluoromethyl)pyrimidin-2-yl)amino)phenyl)piperazine-1-carboxylate (I3) (0.230 g, 0.502 mmol), triphenylphosphine (0.020 g, 0.075 mmol), trans-dichlorobis(triphenylphosphine) palladium(II) (0.035 g, 0.050 mmol) and CuI (0.014 g, 0.075 mmol). The reaction mixture was heated under microwave irradiation at 120° C. for 20 minutes and then concentrated to dryness in vacuo and purified by silica gel chromatography (Biotage Isolera, 40 g Si cartridge, 0-80% EtOAc in cyclohexane) to give the title compound (I5) (0.267 g, 89% yield) as an orange glassy solid; 1H NMR (400 MHz, d6-DMSO) δ 10.27 (br s, 1H), 8.76 (s, 1H), 7.65-7.49 (m, 4H), 7.49-7.38 (m, 2H), 6.95 (d, J=9.1 Hz, 2H), 3.94 (s, 2H), 3.61 (s, 3H), 3.51-3.42 (m, 4H), 3.09-3.00 (m, 4H), 1.42 (s, 9H). LCMS Method C: rt 6.67 min; m/z 596.3 [M+H]+.

Workup

  1. concentrationconcentrated to dryness in vacuo
  2. custompurified by silica gel chromatography (Biotage Isolera, 40 g Si cartridge, 0-80% EtOAc in cyclohexane)

Sources & evidence

ORD record
ord-a4e22869b574442e88ab7e3d7237569a
Source dataset
uspto-grants-2016_08
Patent number
US09421205B2

Reaction notes

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