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

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Reaktionsgleichung

[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

Komponenten

Reaktionsbedingungen

Temperatur: 120 °C

Versuchsvorschrift

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).

Aufarbeitung

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

Quellen und Nachweise

ORD-Eintrag: ord-6979a8a812004f9f8492668e2c4f1b4b
Quelldatensatz: uspto-grants-2016_08
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US09421205B2

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