Abstract:
4-Alkoxy-3-pyrrolin-2-on-1-yl acetic acid alkyl esters are intermediate products for the production of cerebrally-active pharmaceutical products. The advantageous process for production of the new intermediate products is described.
Abstract:
This invention concerns processes for preparing cyclic, 5-membered ring, lactams through the carbonylation of allylic substrates in the presence of rhodium catalysts.
Abstract:
Compounds of formula ##EQU1## where X,X' are divalent aliphatic radicals which may be the same or different are heated to decompose them to lactams.
Abstract:
A catalyzed process for the preparation of monomeric and/or polymeric compounds such as esters, polyesters, ester-amides, and polyester-polyamides which result from the reaction of an imide and an alcohol in the presence of a Group IA, IIA, IIB and/or IIIA metal or metal compound, imide-alcohol condensation catalyst.
Abstract:
A PROCESS FOR THE PREPARATION OF LACTAMS AND SULFONIC ACID DERIVATIVES OF ACTIVE HYDROGEN-CONTAINING ORGANIC COMPOUNDS OF THE GROUP CONSISTING OF OXIMES, ALCOHOLS, PHENOLS, THIOLS, PRIMARY AMINES AND SECONDARY AMINES, WHICH COMPRISES REACTING A LACTAM-O-SULFONIC ACID WITH A COMPOUND SELECTED FROM THE SPECIFIED ORGANIC COMPOUNDS UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS.
Abstract:
CYCLOHEXANONE IS CONVERTED TO 1,1''-PEROXYDICYCLOHEXYLAMINE WHICH IS THEN HEATED IN THE LIQUID PHASE TO PRODUCE CAPROLACTAM AND CYCLOHEXANONE, WHICH CYCLOHEXAMONE IS RECYCLED AS FEED TO THE PROCESS.
Abstract:
CAPROLACTAM IS PREPARED IN A SINGLE STEP WITHOUT FORMATION OF BY-PRODUCT AMMONIUM SULFATE BY CONTACTING 2-NITROCYCLOHEXANONE AND/OR 2-NITROCYCLOHEXEN-1-O1 WITH HYDROGEN AT A TEMPERATURE RANGING FROM 150* TO 300* C. IN THE PRESENCE OF A LIQUID MEDIUM SUCH AS WATER, ALCOHOLS, ETHERS, BENZENE OR MIXTURES THEREOF AND OF AN ACTIVE HYDROGENATION CATALYST, PERFERABLY IN THE FURTHER PRESENCE OF A NITROGEN-CONTAINING BASIC SUBSTANCE SUCH AS AMMONIA. THIS INVENTION RELATS TO A NOVEL PROCESS FOR THE PREPARATION OF E-CAPROLACTAM.
Abstract:
Catalytic processes for preparing caprolactam, pipecolinic acid, and their derivatives, from lysine or alpha-amino-epsilon-caprolactam starting materials, and products produced thereby. A process for preparing caprolactam or a derivative thereof, the process comprising contacting a reactant comprising lysine or alpha aminocaprolactam with a catalyst and a gas comprising hydrogen gas, in the presence of a solvent. The catalyst may be provided on a support material, such as a transition metal.