Pyridine → 1-Fluoro-4-(3-iodopropyl)benzene

To a solution of 2.26 g (14.65 mmol) of 3-(4-fluorophenyl propanol and 3.6 mL (44 mmol) of pyridine in 40 mL of CH2Cl2 at 0° C. was added 5.1 g (29.3 mmol) of methanesulfonic anhydride and the reaction mixture was sitirred for 4 h at rt. The reaction mixture was partitioned between 100 mL of CH2Cl2 and 20 of sat'd NaHCO3 solution. The organic fraction was washed 3 times with sat'd NaHCO3 solution and sat'd NaCl solution, dried over MgSO4 and the filtrate was concentrated several times from heptane to remove pyridine. To the residue in 50 mL of acetone was added 6 g (44 mmol) of LiI and the reaction mixture was Stirred for 20 hr. The reaction mixture was poured into 200 mL of H2O and extracted with ether. The combined organic fractions were washed with sat'd NaCl solution, dried over MgSO4, filtered and the filtrate was concentrated. The residue was purified by chromatography (silica, hexanes: ethyl acetate, 9:1) to give 3.25 g of the title compound.

1. customThe reaction mixture was partitioned between 100 mL of CH2Cl2 and 20 of sat'd NaHCO3 solution
2. washThe organic fraction was washed 3 times with sat'd NaHCO3 solution
3. dry with materialdried over MgSO4
4. concentrationthe filtrate was concentrated several times from heptane
5. customto remove pyridine
6. extractionextracted with ether
7. washThe combined organic fractions were washed with sat'd NaCl solution
8. dry with materialdried over MgSO4
9. filtrationfiltered
10. concentrationthe filtrate was concentrated
11. customThe residue was purified by chromatography (silica, hexanes: ethyl acetate, 9:1)

ORD-Eintrag

ord-c2739e023eb347adba2bb2c9004495eb

Quelldatensatz

uspto-grants-2001_10

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US06303593B1