反应详情

A 5 g quantity of 5-hydroxymethyl-2-pyrrolidinone [Journal of Organic Chemistry, 45, 816 (1980)] was dissolved in 10 ml of dihydropyran, 0.1 ml of concentrated hydrochloric acid was added to the solution, and the mixture was stirred at room temperature for 4 hours. Excessive dihydropyran was distilled off in a vacuum, and the residue was subjected to silica gel column chromatography to obtain an eluate of benzene/ethyl acetate=9/1, which gave 7.9 g of 5-(2-tetrahydropyranoxy)methyl-2-pyrrolidinone (yield 90%).

1. distillationExcessive dihydropyran was distilled off in a vacuum
2. customto obtain an eluate of benzene/ethyl acetate=9/1, which