反应详情

In 2,500 ml of acetonitrile were dissolved 500 g of tert-butyl 6-hydroxy-2-oxohexahydro-3,5-methano-2H-cyclopenta[b]furan-7-carboxylate and 318 g of triethylamine. To the solution below 15° C., 288 g of methacrylic chloride was added dropwise. The solution was stirred at room temperature for 2 hours, another 32 g of methacrylic chloride added, and the solution stirred overnight. A saturated aqueous solution of sodium hydrogen carbonate, 500 ml, was added to the reaction solution, followed by ordinary work-up. Recrystallization from hexane yielded 437 g of the title compound (yield 69%).

1. stirringthe solution stirred overnight
2. customRecrystallization from hexane