1-(triphenylmethyl)-1H-Imidazole-4-acetic acid methyl ester → [1-(4-Cyanobenzyl)-1H-imidazol-5-yl]acetic acid methyl ester

온도

55 °C

To a solution of 1-(triphenylmethyl)-1H-imidazol-4-ylacetic acid methyl ester (8.00 g, 20.9 mmol) in acetonitrile (70 ml) was added bromo-p-toluonitrile (4.10 g, 20.92 mmol) and heated at 55° C. for 3 hr. After this time, the reaction was cooled to room temperature and the resulting imidazolium salt (white precipitate) was collected by filtration. The flitrate was heated at 55° C. for 18 hr. The reaction mixture was cooled to room temperature and evaporated in vacuo. To the residue was added EtOAc (70 ml) and the resulting white precipitate collected by filtration. The precipitated imidazolium salts were combined, suspended in methanol (100 ml) and heated to reflux for 30 min. After this time, the solvent was removed in vacuo, the resulting residue was suspended in EtOAc (75 ml) and the solid isolated by filtration and washed (EtOAc). The solid was treated with sat aq NaHCO3 (300 ml) and CH2Cl2 (300 ml) and stirred at room temperature for 2 hr. The organic layer was separated, dried (MgSO4) and evaporated in vacuo to afford the title compound as a white solid:

1. temperatureAfter this time, the reaction was cooled to room temperature
2. filtrationthe resulting imidazolium salt (white precipitate) was collected by filtration
3. temperatureThe flitrate was heated at 55° C. for 18 hr
4. temperatureThe reaction mixture was cooled to room temperature
5. customevaporated in vacuo
6. additionTo the residue was added EtOAc (70 ml)
7. filtrationthe resulting white precipitate collected by filtration
8. temperatureheated
9. temperatureto reflux for 30 min
10. customAfter this time, the solvent was removed in vacuo
11. customthe solid isolated by filtration
12. washwashed (EtOAc)
13. additionThe solid was treated with sat aq NaHCO3 (300 ml) and CH2Cl2 (300 ml)
14. customThe organic layer was separated
15. dry with materialdried (MgSO4)
16. customevaporated in vacuo

ORD 기록

ord-93ac7920d8f142e6b0aae0b66009ae4c

출처 데이터셋

uspto-grants-1997_04

DOI

10.6084/m9.figshare.5104873.v1

특허 번호

US05624936