PROCESS FOR PREPARATION OF 2 2 6 6 TETRA METHYL 4 OXOPIPERIDINE

摘要

2,2,6,6-Tetramethyl-4-oxopiperidine (I) was prepd. by the reaction of 2,2,4,4,6-pentamethyl-2,3,4,5-tetrahydro pyrimidine (II) with Me2Co, or diaceton alc. 43g IIH2O was reacted with 75g Me2Co and 10 g EtOH at 55≦̸C for 12hr to yield 82% I.