Methyl iodide → 2-Methylsulfanyl-3-(2-trimethylsilanyl-ethoxymethyl)-3H-imidazole-4-carboxylic acid ethyl ester

To a solution of 2-mercapto-3H-imidazole-4-carboxylic acid ethyl ester (1.0 g, 5.8 mmol) in 15 mL of DCM was added triethylamine (NEt3) (1.0 mL, 7.2 mmol) and iodomethane (0.4 mL, 6.4 mmol) and the mixture stirred for 3 h at RT. The mixture was cooled in an ice bath, NEt3 (1.0 mL, 7.2 mmol) and SEM-Cl (1.2 mL, 6.4 mmol) was added, the mixture stirred for 3 hours at RT and then an additional portion of NEt3 (0.5 mL, 3.6 mmol) and SEM-Cl (0.6 mL, 3.2 mmol) was added and the mixture stirred for 8 h at RT. The mixture was diluted with 50 mL of DCM and washed with NaHCO3 (2×60 mL) and brine (60 mL) and dried over Na2SO4. Flash chromatography of the residue on Si gel with 30% EtOAc/hexanes gave the title compound as a colorless oil (1.0 g, 55%). Mass spectrum (ESI, m/z): Calcd. for C13H24N2O3SSi, 317.1 (M+H). found 316.7.

1. temperatureThe mixture was cooled in an ice bath
2. stirringthe mixture stirred for 3 hours at RT
3. stirringthe mixture stirred for 8 h at RT
4. washwashed with NaHCO3 (2×60 mL) and brine (60 mL)
5. dry with materialdried over Na2SO4

ORD 기록

ord-77243453c2f14d4c96b826994e375599

출처 데이터셋

uspto-grants-2014_03

DOI

10.6084/m9.figshare.5104873.v1

특허 번호

US08674100B2