反应详情

200 g of N-BOC-3(R,S)-acetylthio-piperidine are placed in a 10 l reactor with 3.4 l of methanol in an inert atmosphere. To this solution 42 g of sodium methoxide in methanol is added over a period of 15 min. After additional stirring 170 ml of 5 n HCl are added, bringing the pH-value to 2.6-3. The solution is concentrated at an evaporator. The resulting biphasic mixture is taken up with 1.7 l of methyl tert.-butyl ether (MTBE) and 1.7 l of water. After shaking, separation of the aqueous phase and washing the MTBE phase is isolated and evaporated, yielding 170 g of an oil.

1. additionare added
2. concentrationThe solution is concentrated at an evaporator
3. customseparation of the aqueous phase
4. washwashing the MTBE phase
5. customis isolated
6. customevaporated