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Priority to YU71390ApriorityCriticalpatent/YU47350B/en
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Publication of YU47350BpublicationCriticalpatent/YU47350B/en
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Pyridine Compounds
(AREA)
Abstract
Obezbedjen je postupak za dobijanje karboksilnih kiselina koje imaju (n+1) atoma ugljenika, npr. sirćetne kiseline, iz alkohola koji ima n atoma ugljenika, npr. metanola, u tečnoj fazi, karbonilacijom katalizovanom rodijomom. Postupak se izvodi upotrebom katalitičkog stabilizatora odabranog medju izvesnim klasama imidazolijum jodida, alkil supstituisanih piridinijum jodida i hidroksipiridinijum jodida. Najpoželjniji su oni izvedeni iz amina 2-etil-4-metilimidazola, 4-metilimidazola, 4-etilpiridina, 4-t-butilpiridina i 3,4-lutidina kvaternizacijom sa metil grupom.A process is provided for the preparation of carboxylic acids having (n + 1) carbon atoms, e.g. acetic acid, from an alcohol having n carbon atoms, e.g. methanol, in the liquid phase, by rhodium-catalyzed carbonylation. The process is performed using a catalytic stabilizer selected from certain classes of imidazolium iodide, alkyl substituted pyridinium iodide and hydroxypyridinium iodide. Most preferred are those derived from amines of 2-ethyl-4-methylimidazole, 4-methylimidazole, 4-ethylpyridine, 4-t-butylpyridine and 3,4-lutidine by quaternization with a methyl group.
YU71390A1990-04-111990-04-11
PROCEDURE FOR CARBOXYLIC ACID
YU47350B
(en)
BIS AND MONO QUATERNARY AMMONIUM DERIVATIVES OF 2BETA, 16BETA-DIPERIDINO-5ALFA ANDROSTANES PROCEDURE FOR PREPARING THEREOF AND PHARMACEUTICAL PREPARATIONS CONTAINING ANDROSTANE COMPOUNDS