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.
Abstract:
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.
Abstract:
A process for producing a 4-substituted azetidinone derivative represented by the following general formula [III]:
(wherein OR is a protected hydroxy group, Y is an alkyl group, an alkoxy group, a silyloxy group, a carbamoyloxy group, an amino group, a substituted or unsubstituted aromatic group or a substituted or unsubstituted heterocyclic group, and n is an integer of 0 or 1, provided that n does not represent O when Y is an alkoxy group, silyloxy group, carbamoyloxy group or amino group), characterized in that a 2-azetidinone derivative represented by the following general formula [I]:
(wherein OR is as defined above, and X is an alkyl group or a substituted or unsubstituted aromatic group) is reacted with thiocarboxylic acid represented by the following general formula [II]:
HSCO-(CH₂) n -Y [II]
(wherein Y and n are respectively as defined above) in an organic solvent in the presence of copper compounds. The aforementioned method can shorten the production process compared with the prior method. It is also highly advantageous from an industrial point of view because it does not employ mercury salts.
Abstract translation:用于制备由以下通式[III]表示的4-取代的氮杂环丁酮衍生物的方法:(其中OR为保护的羟基,Y为烷基,烷氧基,甲硅烷氧基,氨基甲酰氧基, 氨基,取代或未取代的芳基或取代或未取代的杂环基,n为0或1的整数,条件是当Y为烷氧基,甲硅烷氧基,氨基甲酰氧基或氨基时,n不为O ),其特征在于由以下通式[I]表示的2-氮杂环丁酮衍生物:其中OR如上定义,X为烷基或取代或未取代的芳族基团)与硫代羧酸 在有机溶剂中,在铜化合物的存在下,由以下通式[II]代表:HSCO-(CH 2)n Y [II](其中Y和n分别如上定义)。 与先前的方法相比,上述方法可以缩短生产过程。 从工业角度来看,它也是非常有利的,因为它不使用汞盐。
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.
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:
Present invention describes the direct catalytic liquid phase synthesis of caprolactam from cyclohexanone, hydrogen peroxide and ammonia. The invention can be carried out by using mesoporous materials amongst the MMS family (mesoporous molecular sieves) as catalysts, such as Ti-MCM-41, A1-MCM-41 and Ti-SBA-15 materials at temperatures between 20 and 120 °C.