反应详情

温度

0 °C

A suspension of methyltriphenylphosphonium bromide (21.76 g, 61 mmol) in dry ether (300 ml) was stirred at 0° C. under nitrogen. To this was added a 1.6M solution of butyl lithium (33.3 ml, 53.3 mmole) dropwise. Stirring at 0° C. was continued for 45 min then a solution of 6-(2-iodophenyl)-3-hexanone (Intermediate 10) (11.5 g, 38 mmol) in dry ether (40 ml) was added dropwise. Stirring at 0° C. was continued for 3 hours after which time aqueous ammonium chloride solution was added and the mixture was extracted with ether. The combined extracts were washed once with a mixture of ammonium chloride and sodium chloride solutions, dried over anhydrous magnesium sulphate and evaporated in vacuo. The residue was slurried with cyclohexane to extract the crude product. Purification by SPE eluting with cyclohexane gave the title compound as a colourless liquid (6.8 g, 60%).

1. stirringStirring at 0° C.
2. stirringStirring at 0° C.
3. waitwas continued for 3 hours
4. extractionthe mixture was extracted with ether
5. washThe combined extracts were washed once with a mixture of ammonium chloride and sodium chloride solutions
6. dry with materialdried over anhydrous magnesium sulphate
7. customevaporated in vacuo
8. extractionto extract the crude product
9. customPurification by SPE
10. washeluting with cyclohexane