Abstract:
Un procedimiento para preparar un compuesto de carbonato asimétrico que comprende permitir que un compuesto de carbonato simétrico representado por la fórmula (1):**Fórmula** en la que los R1 son iguales, y representan grupos hidrocarburos monovalentes que pueden tener un/unos sustituyente(s), reaccione con un compuesto de éster representado por la fórmula (2):**Fórmula** en la que R2 y R3 son independientes entre sí, y representan un grupo hidrocarburo monovalente que puede tener un/unos sustituyente(s), en donde el grupo hidrocarburo de R2 y R3 puede estar interrumpido por un grupo de unión seleccionado del grupo que consiste en un enlace éter, un enlace tioéter, un enlace amida, un enlace carbonilo y un enlace éster, o R2 y R3 se unen entre sí para formar Z, y Z representa un grupo hidrocarburo divalente que puede tener un/unos sustituyente(s), en donde el grupo hidrocarburo de Z puede estar interrumpido por un grupo de unión seleccionado del grupo que consiste en un enlace éter, un enlace tioéter, un enlace amida, un enlace carbonilo y un enlace éster, siempre que R2 no sea igual que R1 de la fórmula (1), y el número de enlaces éster contenidos en la fórmula (2) sea 2 o menos en total, en presencia de una hidrolasa, para obtener un compuesto de carbonato asimétrico representado por la fórmula (3):**Fórmula** en la que R1 es tal como se definió anteriormente, y R2' es R2, siempre que cuando R2 y R3 formen Z uniéndose entre sí, entonces R2' sea -Z-C(>=O)-O-R1.
Abstract:
A process for producing a carbonic diester by the catalytic reaction of carbon monoxide with a nitrous ester in the presence of a solid catalyst, characterized by adding a minute amount of a chloroformic ester to the feedstock gas comprising carbon monoxide and a nitrous ester, whereby the catalyst can be kept in a highly activated state for long and can provide the objective diester at a high reaction velocity and a high selectivity stably for long.
Abstract:
A process for producing a carbonic diester by the catalytic reaction of carbon monoxide with a nitrous ester in the presence of a solid catalyst, characterized by adding a minute amount of a chloroformic ester to the feedstock gas comprising carbon monoxide and a nitrous ester, whereby the catalyst can be kept in a highly activated state for long and can provide the objective diester at a high reaction velocity and a high selectivity stably for long.
Abstract:
A carbonic acid diester is produced, at a high reaction rate with a high selectivity and stability, by catalytically reacting carbon monoxide with a nitrous acid ester, preferably in a gas phase, in the presence of a solid catalyst composed of a solid carrier and a catalytic solid material carried on the carrier and comprising: (1) a first catalyst component comprising at least one member selected from the group consisting of platinum group metals and compounds thereof; (2) a second catalyst component comprising at least one member selected from the group consisting of lanthanide group metals and compounds thereof; and collecting the resultant carbonic acid diester from a reaction mixture discharged from the catalytic reaction step.
Abstract:
The catalyst for alkylation of the present invention contains an inorganic structural material having an ion-exchange ability and a metal ion having a valency of 2 or more. The metal ion is supported on the inorganic structural material. The inorganic structural material is preferably a zeolite. The metal ion is preferably a lanthanide metal. The catalyst for alkylation imparts industrially satisfiable activity and selectivity and can be readily separated, collected and recycled. Furthermore, the process for producing an alkylaromatic hydrocarbon compound of the present invention includes reacting an aromatic hydrocarbon compound and a compound having an unsaturated bond in the presence of the catalyst for alkylation.
Abstract:
A process for producing a carbonic diester by the catalytic reaction of carbon monoxide with a nitrous ester in the presence of a solid catalyst, characterized by adding a minute amount of a chloroformic ester to the feedstock gas comprising carbon monoxide and a nitrous ester, whereby the catalyst can be kept in a highly activated state for long and can provide the objective diester at a high reaction velocity and a high selectivity stably for long.