反应详情

1,1-Dimethylethyl 4-(4-piperidinylmethyl)-1-piperidinecarboxylate (may be prepared as described in Description 2) (4.8 g), cyclobutanone (3.81 ml) and triethylamine (4.7 ml) were stirred in DCM (200 ml) at room temperature. After 10 min sodium triacetoxyborohydride (7.2 g) was added and the reaction was stirred at room temperature overnight. The reaction mixture was evaporated and redissolved in dichloromethane (50 ml). After washing with saturated potassium carbonate solution (2×50 ml), saturated sodium hydrogen carbonate solution (2×50 ml) and saturated brine (50 ml) the organic phase was dried (MgSO4) and evaporated to give the title compound (D5) as a colourless solid (5.72 g).

1. customThe reaction mixture was evaporated
2. dissolutionredissolved in dichloromethane (50 ml)
3. washAfter washing with saturated potassium carbonate solution (2×50 ml), saturated sodium hydrogen carbonate solution (2×50 ml) and saturated brine (50 ml) the organic phase
4. dry with materialwas dried (MgSO4)
5. customevaporated