反应详情

In the same way as in Example 4, 12.8 ml (20 mmol) of a 15 % by weight hexane solution of n-butyllithium was reacted with 960 mg (10 mmol) of a solution of 960 mg (10 mmol) of 2-cyclohexenone in 10 ml of ether for one hour in the presence of 1.9 g (10 mmol) of cuprous iodide and 2.0 g (10 mmol) of tri-n-butylphosphone. Then, 5 ml of hexamethylphosphoric triamide was added, and the mixture stirred for about 10 minutes. Furthermore, a solution of 5.1 g (50 mmol) of acetic anhydride in 20 ml of ether was added, and the mixture was stirred for an additional 2.5 hours at room temperature. After the reaction, the reaction product was post-treated, extracted, washed, and dried in the same way as in Example 4 to afford 2.285 g of a crude product. The crude product was purified by column chromatography to afford 81 mg (0.5 mmol) of 3-n-butylcyclohexanone as a by-product in a yield of 5%, and 98 mg (0.5 mmol) of 2-acetyl-3-n-butylcyclohexanone as a product in a yield of 5%.

1. stirringthe mixture was stirred for an additional 2.5 hours at room temperature
2. customAfter the reaction
3. additionthe reaction product was post-treated
4. extractionextracted
5. washwashed
6. customdried in the same way as in Example 4
7. customto afford 2.285 g of a crude product
8. customThe crude product was purified by column chromatography