反应详情

Benzyltrimethylammonium dichloroiodate (2.6 g 7.5 mmol) was added in portions to a stirred solution of (2E)-3-(dimethylamino)-1-(1-isopropyl-2-methyl-1H-imidazol-5-yl)prop-2-en-1-one (Method 24 of WO 03/076436; 1.1 g 5 mmol) in MeOH/DCM (15/30 ml) at room temperature. After 1 hour water (10 ml) and DCM (20 ml) were added followed after a further 30 minutes by saturated sodium hydrogen carbonate solution (20 ml). The organics were separated, re-extracted the aqueous with DCM (25 ml). The combined organics were washed with 5% (w/v) sodium thiosulphate solution (30 to 35 ml) and brine (25 ml), dried (Na2SO4) and evaporated to give the title compound as an oil (crude yield 1.68 g still wet). M/z 256.

1. customThe organics were separated
2. extractionre-extracted the aqueous with DCM (25 ml)
3. washThe combined organics were washed with 5% (w/v) sodium thiosulphate solution (30 to 35 ml) and brine (25 ml)
4. dry with materialdried (Na2SO4)
5. customevaporated