反应详情

Butyllithium (23.3 ml, 8.0M in tetrahydrofuran) was added dropwise to a solution of 18.3 g of 3,5-dimethylisoxazole in 800 ml of tetrahydrofuran held at -77° C. under nitrogen, and the mixture was stirred for 30 minutes. 1,4-bis(Bromomethyl)cyclohexane (50.4 g) was then added, and the reaction mixture was stirred for 3 hours at -70° C. and at room temperature overnight. The product was isolated and purified by chromatography to give 31 g (58%) of 5-[2-(4-bromomethylcyclohexyl)ethyl]-3-methylisoxazole as a liquid used directly in the next reaction.

1. customheld at -77° C. under nitrogen
2. stirringthe reaction mixture was stirred for 3 hours at -70° C. and at room temperature overnight
3. customThe product was isolated
4. custompurified by chromatography