Triphenylphosphine → tert-Butyl 3-((2-(methylthio)-5-(trifluoromethyl)pyrimidin-4-yl)ethynyl)benzoate

HRID 1485147Notes

Reaction equation

[C:1]([C:3]1[CH:4]=[C:5]([CH:13]=[CH:14][CH:15]=1)[C:6]([O:8][C:9]([CH3:12])([CH3:11])[CH3:10])=[O:7])#[CH:2].I[C:17]1[C:22]([C:23]([F:26])([F:25])[F:24])=[CH:21][N:20]=[C:19]([S:27][CH3:28])[N:18]=1.C1C=CC(P(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>CN(C=O)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>[CH3:28][S:27][C:19]1[N:18]=[C:17]([C:2]#[C:1][C:3]2[CH:4]=[C:5]([CH:13]=[CH:14][CH:15]=2)[C:6]([O:8][C:9]([CH3:11])([CH3:12])[CH3:10])=[O:7])[C:22]([C:23]([F:26])([F:24])[F:25])=[CH:21][N:20]=1

Participants

Conditions

Temperature: 120 °C

Procedure

t-Butyl 3-ethynylbenzoate (I17) (1.603 g, 7.93 mmol), 4-iodo-2-(methylthio)-5-(trifluoromethyl)pyrimidine (I14) (1.647 g, 5.15 mmol), PdCl2(PPh3)2 (0.316 g, 0.45 mmol), PPh3 (0.355 g, 1.35 mmol), Cu(I)I (0.232 g, 1.22 mmol) and trethylamine (4.00 mL, 28.7 mmol) were combined in DMF (20 mL) and the resulting mixture heated at 120° C. under microwave irradiation for 25 minutes. The mixture was then concentrated under reduced pressure and purified twice using silica gel column chromatography (10-20% EtOAc/petroleum benzine 40-60° C. then 50-100% DCM/petroleum benzine 40-60° C.) to give the title compound (I18) (0.624 g, 31%) as a yellow solid; 1H NMR (400 MHz, CDCl3) δ 8.73 (d, J=0.8 Hz, 1H), 8.25 (m, 1H), 8.08 (m, 1H), 7.78 (m, 1H), 7.48 (m, 1H), 2.63 (s, 3H), 1.61 (s, 9H).

Workup

concentrationThe mixture was then concentrated under reduced pressure
custompurified twice using silica gel column chromatography (10-20% EtOAc/petroleum benzine 40-60° C.

Sources & evidence

ORD record: ord-6979a8a812004f9f8492668e2c4f1b4b
Source dataset: uspto-grants-2016_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09421205B2

Reaction notes

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