Tetrahydrofuran → Methyl 2-(2-((2-(methylthio)-5-(trifluoromethyl)pyrimidin-4-yl)ethynyl)phenyl)acetate

HRID 705734Notes

Reaction equation

I[C:2]1[C:7]([C:8]([F:11])([F:10])[F:9])=[CH:6][N:5]=[C:4]([S:12][CH3:13])[N:3]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[C:33]([C:35]1[CH:40]=[CH:39][CH:38]=[CH:37][C:36]=1[CH2:41][C:42]([O:44][CH3:45])=[O:43])#[CH:34].C1COCC1>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.C(N(CC)CC)C>[CH3:13][S:12][C:4]1[N:3]=[C:2]([C:34]#[C:33][C:35]2[CH:40]=[CH:39][CH:38]=[CH:37][C:36]=2[CH2:41][C:42]([O:44][CH3:45])=[O:43])[C:7]([C:8]([F:11])([F:10])[F:9])=[CH:6][N:5]=1

Participants

Conditions

Temperature: 100 °C

Procedure

4-Iodo-2-(methylthio)-5-(trifluoromethyl)pyrimidine (I12) (2.00 g, 6.24 mmol), PdCl2(PPh3)2 (438 mg, 625 μmol), CuI (119 mg, 625 μmol) and triphenylphosphine (164 mg, 625 μmol) were placed into an oven dried microwave reaction vial under nitrogen. Methyl 2-(2-ethynylphenyl)acetate (I4) (131 g, 7.49 mmol), THF (20 mL) and triethylamine (10 mL) were added and the resulting mixture was stirred at 100° C. under microwave irradiation for 10 min. The volatiles were evaporated under reduced pressure then the residue was adsorbed onto silica from DCM. The pre-adsorbed material was chromatographed on silica gel (0-25% ethyl acetate/petroleum benzine 40-60° C.) to give the title compound (I13) (1.571 g, 69%) as an orange solid; 1H NMR (400 MHz, CDCl3) δ 8.71 (d, J=0.8 Hz, 1H), 7.68 (dd, J=7.7, 1.1 Hz, 1H), 7.50-7.29 (m, 3H), 3.93 (s, 2H), 3.71 (d, J=3.4 Hz, 3H), 2.62 (d, J=3.4 Hz, 3H).

Workup

customdried
custommicrowave reaction vial under nitrogen
customThe volatiles were evaporated under reduced pressure
customThe pre-adsorbed material was chromatographed on silica gel (0-25% ethyl acetate/petroleum benzine 40-60° C.)

Sources & evidence

ORD record: ord-8eb2e009b7f74928b8d3f57c8279cfeb
Source dataset: uspto-grants-2015_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09174946B2

Reaction notes

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