4-Pentyn-1-ol → 4-Pentyn-1-ol, 5-[4-(trifluoromethoxy)phenyl]-

Temperatur

50 °C

A mixture of 5 g (17 mmol) 1-iodo-3-trifluoromethoxy-benzene, 973 mg (1 mmol) Pd(PPh3)4 and 160 mg (1 mmol) cuprous iodide in 130 ml piperidine was stirred for 30 min at 50° C. under an argon atmosphere. 2.125 g (25 mmol) 4-Pentyn-1-ol was added within 60 min at 50° C. The temperature was raised to 80° C. and the mixture was stirred for 3 h at this temperature. The reaction mixture was cooled to ambient temperature, poured into a solution of saturated aqueous 10% KHSO4/ice water 1/1 and extracted two times with tert butyl methyl ether. The combined extracts were washed with water and brine (two times) and dried over sodium sulfate. The solvent was removed under reduced pressure and the residue purified by column chromatography (silica gel, heptane/AcOEt) to give 3.4 g of the title compound as orange oil.

1. temperatureThe temperature was raised to 80° C.
2. stirringthe mixture was stirred for 3 h at this temperature
3. temperatureThe reaction mixture was cooled to ambient temperature
4. extractionextracted two times with tert butyl methyl ether
5. washThe combined extracts were washed with water and brine (two times)
6. dry with materialdried over sodium sulfate
7. customThe solvent was removed under reduced pressure
8. customthe residue purified by column chromatography (silica gel, heptane/AcOEt)

ORD-Eintrag

ord-f5c63ede46b6426ea3f96c3c00e73f0d

Quelldatensatz

uspto-grants-2007_08

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07253192B2