Abstract:
This invention relates in part to processes for producing one or more substituted or unsubstituted epsilon caprolactams, e.g., epsilon caprolactam, which comprises: (a) subjecting one or more substituted or unsubstituted alkadienes to hydroxycarbonylation in the presence of a hydroxycarbonylation catalyst, e.g., a metal-organophosphorus ligand complex catalyst, and neutralization with a base to produce one or more substituted or unsubstituted pentenoic acid salts; (b) subjecting said one or more substituted or unsubstituted pentenoic acid salts to hydroformylation in the presence of a hydroformylation catalyst, e.g., a metal-organophosphorus ligand complex catalyst, to produce one or more substituted or unsubstituted formylvaleric acid salts and/or one or more substituted or unsubstituted epsilon caprolactam precursors; and (c) subjecting said one or more substituted or unsubstituted formylvaleric acid salts and/or said one or more substituted or unsubstituted epsilon caprolactam precursors to reductive amination in the presence of a reductive amination catalyst and cyclization optionally in the presence of a cyclization catalyst to produce said one or more substituted or unsubstituted epsilon caprolactams. This invention also relates in part to reaction mixtures containing one or more substituted or unsubstituted epsilon caprolactams as the principal product(s) of reaction.
Abstract:
Compounds of the formula (I) in which A is oxygen, sulphur or NH; B is a group of the formula (IIa) or (IIb); and the other variables have the meaning given in claim 1, may be used as inhibitors of the enzyme cyclo-oxygenase II.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung von C 4 -C 15 -Lactamen, bei dem ein C 1 -C 10 -Alkylnitrit mit einem C 4 -C 15 -Cycloalkan umgesetzt wird und während der Umsetzung mit einer Leuchtdiode belichtet wird. Das sich dabei bildende C 4 -C 15 - Cyclohexanonoxim wird dann weiter zu einem C 4 -C 15 -Lactam umgesetzt, der gebildete C- 1 -C 10 -Alkohol wird in die Herstellung des C- 1 -C- 10 -Alkylnitrits recycliert.
Abstract:
The invention relates to a method for preparing an intermediate compound for a diisocyanate, comprising reacting a diamine represented by the formula H 2 N-(CH 2 ) 0 -Y-(CH 2 ) p -NH 2 wherein Y is selected from CH(OX) or CH(COOX), o and p each are an integer of 0-4, with the proviso that the sum of o and p is 4 or less, preferably 2, 3 or 4, X is a protective group, with a carbonylbislactam, preferably carbonylbiscaprolactam, thereby forming a compound with the formula (I) wherein each L is a lactam from the carbonylbislactam.
Abstract:
The present invention provides methods for making N-methylpyrrolidine and analogous compounds via hydrogenation. Novel catalysts for this process, and novel conditions/yields are also described. Other process improvements may include extraction and hydrolysis steps. Some preferred reactions take place in the aqueous phase. Starting materials for making N-methylpyrrolidine may include succinic acid, N-methylsuccinimide, and their analogs.
Abstract:
The present invention provides methods for making N-methylpyrrolidine and analogous compounds via hydrogenation. Novel catalysts for this process, and novel conditions/yields are also described. Other process improvements may include extraction and hydrolysis steps. Some preferred reactions take place in the aqueous phase. Starting materials for making N-methylpyrmlidine may include succinic acid. N-methylsuccinimide, and their analogs.