A process using these improved mutants to produce the 3-hydroxycarboxylic acids is also provided.Mark S. PayneRobert DiCosimoDaniel P. O'KeefeUSUS7148051 2004年8月16日 2006年12月12日 E. I. Du Pont De Nemours And Company Production of 3-hydroxycarboxylic acid using nitrilase...
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Hydrolysis of nitrile functionality has been a crucial synthetic approach to produce important amides and carboxylic acids, since it also allows for carbon chain extensions. Chemically, the hydrolytic reaction proceeds in an aqueous medium to yield carboxylic acid via amide formation; however, the react...
Process for the hydrolysis of carboxylic acid nitriles in the presence of a catalyst of manganese dioxide Process for the catalytic hydrolysis of nitriles of carboxylic acids or SH-substituted SR- the f贸rmulageneral R1-CR2R3-CN, to form the corresponding carbo... A Ronneburg,C Weckbecker,H...
Two distinct enzyme systems, a nitrilase catalyzing the direct conversion of nitriles to carboxylic acids and separate but cotranscribed nitrile hydratase and amidase activities, are now well known. Nitrile hydratases are metalloenzymes, incorporating FeIII or CoII ions in thiolate ligand networks ...
Nitrilases hydrolyze to the carboxylic acid and hydratases to the carboxamide (Scheme 26). Many large scale industrial processes are run with these enzymes to produce achiral materials, however these enzymes can be used to make chiral acids (Scheme 27)45,46. In the case of nitrile hydratases...
The resulting imine was then hydrolyzed to corresponding ketone while having NH3 as a by-product. Acyl-enzyme was then hydrolyzed by the addition of H2O, and finally liberated the carboxylic acid along with the regenerated enzyme. On the same year, Hook and Robinson demonstrated that a ...
Currently, it has important applications as ionic elastomer [1], damping materials [2], self-crosslinking film [3], polymer composites and blends [4], and so on, owing to its unique chemical structure. XNBR contains different active functional groups, including carboxylic, nitrile and alkene ...
PURPOSE:Carboxylic acid amide or aldoxime is stably and safely dissolved in a specific cyclic urea containing a dehydrating reagent to effect the dehydration, thus giving corresponding nitrile. CONSTITUTION:The dehydration of a carboxylic acid amide as propionamide or aldoxyime as acetaldoxime is effecte...