Sodium Methoxide → 6-Acetyl-2-butyl-5,6,7,8-tetrahydro-pyrido-[4,3-d]pyrimidin-4(3H)-one

Participants

Reaction Steps

A mixture of 1.5 g of ethyl 1-acetyl-4-oxo-3-piperidinecarboxylate and 1.0 g of valeramidine hydrochloride in 15 ml of anhydrous ethyl alcohol is treated with 7.5 ml of a 1M solution of sodium methoxide in methanol. The resulting mixture is stirred and heated at reflux for one hour. The reaction mixture is allowed to cool over 30 minutes then filtered. The filtrate is evaporated to a colorless syrup which is stirred with 50 ml of ether for 2 hours then filtered. The tacky cake is dried under high vacuum at 56° C. to afford 1.7 g of the desired product, m.p. 106°-113° C.

Provenance & Evidence