114920-65-9Relevant articles and documents
ACETALS OF LACTAMS AND ACID AMIDES. 49. REACTION OF N-METHYL-2-PYRROLIDONE AND N-METHYL-2-PIPERIDONE ACETALS WITH ENAMINO DIKETONES
Shanazarov, A. K.,Solov'eva, N. P.,Chistyakov, V. V.,Sheinker, Yu. N.,Granik, V. G.
, p. 1178 - 1182 (2007/10/02)
It was established that acetals of lactams react with enamino diketones to give cyclic dienediamines.The dienediamines obtained in the reaction of N-methyl-2-pyrrolidone diethylacetal with 2-aminomethylenedimedone and 2-N,N-dimethylaminomethylenedimedone are converted to 3-(β-methylamino)ethyl-6,6-dimethyl-5,6,7,8-tetrahydro-5-coumarinone hydrochloride when they are heated in dilute hydrochloric acid.