摘要:
Process for producing lactam compounds and Beckmann rearrangement catalysts There is provided a catalyst which is highly active, stable and safe and forms less byproducts for a process for producing a lactam, and a production process. A cycloalkylidene-aminoaxy-1,3,5-triazine compound is provided as a Beckmann rearrangement catalyst and/or a reaction starting material in a reaction process for producing a lactam compound.
摘要:
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.
摘要:
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.
摘要:
The invention relates to a method for simultaneously producing a cyclic lactam and a cyclic amine by simultaneously reacting an aliphatic alpha, omega diamine and an aliphatic alpha, omega aminonitrile in the gas phase with water and in the presence of a heterogeneous catalyst.
können aus Lactam-N-carbonsäureestern oder Lactim-O-carbonsäureestern der Formeln
durch thermische oder gemischt thermisch und katalysierte CO₂-Abspaltung bei 80-450°C hergestellt werden. Die Lactam-N-carbonsäureester und die Lactim-O-carbonsäureester können aus am Stickstoff unsubstituierten Lactamen der Formel
und Carbonaten oder Pyrocarbonaten der Formel
R³O-CO-(-O-CO) n -OR³ (V)
in situ hergestellt und ohne Zwischenisolierung ebenfalls unter CO₂-Abspaltung in die N-substituierten Lactame der Formel (I) umgewandelt werden. Die Indices m und n und die Substituenten R¹, R² und R³ haben die in der Beschreibung angegebene Bedeutung. Es kann in der Gasphase oder der Flüssigphase gearbeitet werden.