反应详情

A solution of 5 g of potassium bicarbonate in 150 ml of water was added to a mixture of 8.22 g (30 mMole) of 1,3-bis(dimethylphosphono)propan-2-one and 5.94 g (80 mMole) of dodecan-1,12-dial in 150 ml of t-butanol. After 21/2 h stirring at 27° under nitrogen water was added and the mixture was extracted with ether. The organic layer was separated, washed with brine, dried over sodium sulphate and evaporated. The residue was chromatographed on 150 g of silica gel. Hexane-ethyl acetate 1:1 eluted 2.68 g of unreacted dodecan-1,12-dial and ether eluted 4.38 g (42%, resp. 75% when based on recovered dial) of the title compound as a viscous oil.

1. additionwas added
2. extractionthe mixture was extracted with ether
3. customThe organic layer was separated
4. washwashed with brine
5. dry with materialdried over sodium sulphate
6. customevaporated
7. customThe residue was chromatographed on 150 g of silica gel
8. washHexane-ethyl acetate 1:1 eluted 2.68 g of unreacted dodecan-1,12-dial and ether
9. washeluted
10. custom4.38 g (42%, resp. 75% when based on recovered dial) of the title compound as a viscous oil