反应详情

Solid lithium aluminum hydride (3.5 g) was added slowly to a solution of 15.0 g 5-ethoxycarbonyl-2-piperidone in 350 ml THF at -4° C. After stirring for 1 hour under a nitrogen atmosphere, the reaction was decomposed by dropwise addition of 3.5 ml water, 3.5 ml 5N NaOH and 10.5 ml water. The mixture was filtered and the granular precipitate washed with 100 ml THF. Evaporation of the combined filtrate and washings provided 6.0 g of the title compound: MS m/z 130 (M+ +1), 129 (M+), 128 (M+ -1) 101, 73, 56; 90-MHz 1H NMR (CDCl3) δ1.42-1.60 (m, 1 H), 1.60-2.05 (m, 2 H), 2.10-2.47 (m, 2 H), 3.05 (t, J=9 Hz, 1 H), 3.21-3.58 (m, 4 H), 6.85 (s, 1 H).

1. filtrationThe mixture was filtered
2. washthe granular precipitate washed with 100 ml THF
3. customEvaporation of the combined filtrate and washings