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Priority to KR7402855ApriorityCriticalpatent/KR790000006B1/en
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Publication of KR790000006B1publicationCriticalpatent/KR790000006B1/en
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.
KR7402855A1974-06-211974-06-21Process for preparation of 2 2 6 6 tetra methyl 4 oxopiperidine
KR790000006B1
(en)
Theophylline-7-acetic acid ester of d,l-trans-sobrerol having mucosecretolytic-fluidizing and antibronchospastic activity, a process for its preparation and pharmaceutical compositions thereof