Methyl iodide → HCID 90030086, compound

Temperature

0 °C

Into a 250-mL 3-neck round-bottom flask, was placed a solution of (1-benzyl-4-methyl-1H-pyrazol-3-yl)methanol (compound 268.2, 1.7 g, 8.4 mmol) in THF (50 mL). The solution was cooled to 0° C., then sodium hydride (470 mg, 11.8 mmol, 60% dispersion in mineral oil) was added in portions at 0° C., and then the mixture was stirred for 20 min. Iodomethane (750 μL, 12 mmol) was added at 0° C., then the resulting mixture was stirred for 2 h at room temperature. The reaction was carefully quenched by drop-wise addition of water (30 mL) and the mixture was extracted with ethyl acetate (3×100 mL). The combined organic extracts were washed with brine (3×100 mL), dried (Na2SO4), filtered and concentrated under reduced pressure. The residue was purified by a silica gel chromatography with ethyl acetate/petroleum ether (1:10) as eluent to obtain the title compound as a yellow oil (1.5 g, 83%).

1. customInto a 250-mL 3-neck round-bottom flask, was placed
2. stirringthe resulting mixture was stirred for 2 h at room temperature
3. customThe reaction was carefully quenched by drop-wise addition of water (30 mL)
4. extractionthe mixture was extracted with ethyl acetate (3×100 mL)
5. washThe combined organic extracts were washed with brine (3×100 mL)
6. dry with materialdried (Na2SO4)
7. filtrationfiltered
8. concentrationconcentrated under reduced pressure
9. customThe residue was purified by a silica gel chromatography with ethyl acetate/petroleum ether (1:10) as eluent

ORD record

ord-0fb49e3146c84c14bfd780e9cd0203dd

Source dataset

uspto-grants-2016_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09428502B2