1-Methylimidazole → HCID 20029388, compound

in a nitrogen atmosphere, 41.0 g of 1-methylimidazole was added to 500 ml of acetonitrile, followed by 70 ml of triethylamine, and the mixture was cooled in an ice bath. 38.63 g of methyl chloroformate was added dropwise over 30 minutes, the mixture was stirred at room temperature overnight, and filtered. The filtrate was stripped of volatiles; the residue was dissolved in 500 ml of methylene chloride and the solution was washed with brine, then water, then dried (Na2SO4) and stripped of solvent. The residue was flash chromatographed on silica gel, with a 975:25 v:v mixture of methylene chloride and methanol as eluent. Evaporation of the solvent gave methyl 1-methylimidazole-2-carboxylic acid (37A), as a light yellow oil.

1. temperaturethe mixture was cooled in an ice bath
2. filtrationfiltered
3. dissolutionthe residue was dissolved in 500 ml of methylene chloride
4. washthe solution was washed with brine
5. dry with materialwater, then dried (Na2SO4)
6. customchromatographed on silica gel, with a 975:25 v
7. additionv mixture of methylene chloride and methanol as eluent
8. customEvaporation of the solvent

ORD record

ord-33686b9b89fe45bca11e4a7f1d0dc2eb

Source dataset

uspto-grants-1989_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04853027