反应详情

A solution of 10.0 g (40.5 mmol) [3R-(R*, R*)]methyl 5-oxo-1-(-1-phenylethyl)-3-pyrrolidinecarboxylate in 75 ml dry tetrahydrofuran was added dropwise to a mixture of 6.50 g (171 mmol) lithium aluminum hydride in 100 ml tetrahydrofuran. The mixture was refluxed overnight, diluted with 50 ml tetrahydrofuran and treated dropwise with 6.5 ml water, 6.5 ml 15% sodium hydroxide and 19.5 ml water. Solids were removed by filtration and the filtrate was evaporated to a syrup which was dissolved in dichloromethane, dried (MgSO4), and reevaporated to give 8.06 g of crude crystalline product. Recrystallization from hexane afforded 7.25 g (87%) of the title compound, mp 86°-88° C. [α]D +51.3° C. (C, 1.06, methanol).

1. temperatureThe mixture was refluxed overnight
2. customSolids were removed by filtration
3. customthe filtrate was evaporated to a syrup which
4. dissolutionwas dissolved in dichloromethane
5. dry with materialdried (MgSO4)
6. customreevaporated
7. customto give 8.06 g of crude crystalline product
8. customRecrystallization from hexane