Water → HCID 69412018, compound

Participants

Reaction Steps

70.0 g 2-dimethylaminomethyl-1-(6-methoxynaphthalen-2-yl)cyclohexane-1,4-diol were suspended in 560 ml THF p.a., 44.0 g potassium-tert.-butylate added in portions, the mixture stirred for 20 minutes, 21.0 ml butyryl chloride added dropwise, the mixture stirred for a further 20 minutes and a further 21.0 g potassium-tert.-butylate and 20.0 ml butyryl chloride respectively added again twice in accordance with the above model. For working up, 290 ml water were added with ice bath cooling, the phases separated, the mixture extracted once with ethyl acetate, the combined organic phases washed with 1 M sodium hydrogen carbonate solution, dried by magnesium sulphate, filtered and concentrated. 47.1 g of the hydrochloride of butyric acid 3-dimethylaminomethyl-4-hydroxy-4-(6-methoxynaphthalen-2-yl)cyclohexyl ester were obtained from the crude product obtained (90 g) in the same way as in AAV 1.

Provenance & Evidence