反应详情

温度

50 °C

A mixture of 13.4 g (0.12 mol) of potassium tert-butoxide and 100 g of tert-butanol was stirred and heated until the tert-butoxide totally dissolved. The solution was cooled to about 50° C. and 17 g (0.12 mmol) of ethyl 2-methylacetoacetate was added dropwise. Ethyl-6-bromohexanoate (30 g, 0.13 mmol) was then added dropwise and the reaction mixture was stirred and refluxed for 5 hours. The mixture was filtered and the solvent was removed under reduced pressure. The residue was partitioned between 1 M HCl and chloroform. The organic layer was dried over magnesium sulfate and purified on silica gel using 1:10 ethyl acetate/hexane as the eluent to yield 25 g (75%) of diethyl 2-acetyl-2-methyloctanedioate (3) as yellow liquid.

1. dissolutiontotally dissolved
2. stirringthe reaction mixture was stirred
3. temperaturerefluxed for 5 hours
4. filtrationThe mixture was filtered
5. customthe solvent was removed under reduced pressure
6. customThe residue was partitioned between 1 M HCl and chloroform
7. dry with materialThe organic layer was dried over magnesium sulfate
8. custompurified on silica gel using 1:10 ethyl acetate/hexane as the eluent