Methyl iodide → HCID 86684043, compound

Temperature

0 °C

To a 100-mL single-neck round-bottomed containing 4-nitro-2H-1,2,3-triazole (2.0 g, 17.5 mmol) and THF (10 mL) at 0° C. was added NaH (1.7 g, 35.0 mmol, 2.0 eq.). The mixture was stirred at 0° C. for 15 min. A solution of iodomethane (3.68 g, 26.3 mmol, 1.5 eq.) in acetone (40 mL) was added and the resulting reaction mixture was stirred at room temperature for 2 h. After this time, the reaction was quenched by water (20 mL) at 0° C. and concentrated under reduced pressure. The residue was diluted with dichloromethane (100 mL). It was then washed with brine, dried over anhydrous Na2SO4, and concentrated under reduced pressure. The residue was purified by silica-gel column chromatography eluting with 6:1 petroleum ether/ethyl acetate to afford 293a (800 mg, 35%) as a light yellow solid and the regioisomer 1-methyl-5-nitro-1H-1,2,3-triazole (1.34 g, 60%) as a white solid. 1H NMR (500 MHz, CDCl3) δ 8.34 (s, 1H), 4.26 (s, 3H).

1. customthe resulting reaction mixture
2. stirringwas stirred at room temperature for 2 h
3. customAfter this time, the reaction was quenched by water (20 mL) at 0° C.
4. concentrationconcentrated under reduced pressure
5. additionThe residue was diluted with dichloromethane (100 mL)
6. washIt was then washed with brine
7. dry with materialdried over anhydrous Na2SO4
8. concentrationconcentrated under reduced pressure
9. customThe residue was purified by silica-gel column chromatography
10. washeluting with 6:1 petroleum ether/ethyl acetate

ORD record

ord-63528878465342e5bd1936e7b00d1a17

Source dataset

uspto-grants-2014_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08716274B2