ES427508A1 - Procedure for the preparation of 2,2,6,6-tetrametil-4- oxopiperidina. (Machine-translation by Google Translate, not legally binding)
- Google Patents
Procedure for the preparation of 2,2,6,6-tetrametil-4- oxopiperidina. (Machine-translation by Google Translate, not legally binding)
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Novartis AG
Original Assignee
Ciba Geigy AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CH924173Aexternal-prioritypatent/CH574412A5/en
Application filed by Ciba Geigy AGfiledCriticalCiba Geigy AG
Publication of ES427508A1publicationCriticalpatent/ES427508A1/en
Low-Molecular Organic Synthesis Reactions Using Catalysts
(AREA)
Hydrogenated Pyridines
(AREA)
Abstract
Process for the preparation of 2,2,6,6-tetramethyl-4-oxopiperidine, characterized in that, in a first phase, acetone is reacted at 5 to 60ºC with ammonia in the presence of 0.2 to 12 mol% ( with respect to the acetone used) of an acid catalyst and, in a second phase, with or without addition of water, the reaction is completed by further heating, the total amount of the included acetone being of ammonia, in molar ratio equal to or greater than 1.6: 1. (Machine-translation by Google Translate, not legally binding)
ES427508A1973-06-251974-06-21Procedure for the preparation of 2,2,6,6-tetrametil-4- oxopiperidina. (Machine-translation by Google Translate, not legally binding)
ExpiredES427508A1
(en)
Obtaining procedure of teofilin-7-acetate of p-hidroxi-N- (1-methyl-2-fenoxytel) norefedrina. (Machine-translation by Google Translate, not legally binding)
Procedure for obtaining an insoluble salt of alpha (pclorofenoxy) isobutiril ampicillin. (Machine-translation by Google Translate, not legally binding)