Piperidine,1-chloro-2,2,6,6-tetramethyl- synthesis
- Product Name:Piperidine,1-chloro-2,2,6,6-tetramethyl-
- CAS Number:32579-76-3
- Molecular formula:C9H18ClN
- Molecular Weight:0
768-66-1
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Yield:32579-76-3 99%
Reaction Conditions:
with chlorine;sodium hydroxide in water at 5 - 20; for 1.5 h;Inert atmosphere;Reagent/catalyst;Time;
Steps:
1 Example 1 : Use of NaOH as a base
20 g of 2,2,6,6-tetramethylpiperidine are mixed with 40.7 g, 1.1 eq, of 15% sodium hydroxide solution and cooled to 5 to 10°C. Over a period of 1.5 hours, 10.8 g, 1.1 eq. of chlorine gas are introduced, then nitrogen gas is used to drive out the excess chlorine and the mixture is warmed to room temperature (RT). After separating the phases, washing the aqueous phase with 25 ml of dichloromethane, drying the combined organic phases with magnesium sulphate and distilling off the dichloromethane in vacuo, 24.2 g, 99%), of l-chloro-2,2,6,6-tetramethylpiperidine are obtained.
References:
WO2013/120874,2013,A1 Location in patent:Page/Page column 8
