摘要:
A process for preparing indoles in high yield by reacting anilines and 1.2-glycols in a liquid phase in the presence of a cadmium bromide or idoide/potassium bromide or iodide catalyst. The used catalyst can be easily recovered and when reused, exhibits excellent performance.
摘要:
An improved process for preparing a β-acyloxypropionaldehyde by reacting acrolein and a carboxylic acid is disclosed, in which the reaction is in the presence of calcium chloride and/or calcium bromide as a catalyst. The catalyst is very cheap and attains improved conversion and improved selectivity.
摘要:
There is disclosed a process for preparing glycol aldehyde from ethylene glycol by use of a complex system catalyst comprising copper and other inorganic component, which comprises permitting 0.001 to 0.3 mole of oxygen per one mole of ethylene glycol to be co- present in the reaction system.
摘要:
An improved process for preparing a β-acyloxypropionaldehyde by reacting acrolein and a carboxylic acid is disclosed, in which the reaction is in the presence of calcium chloride and/or calcium bromide as a catalyst. The catalyst is very cheap and attains improved conversion and improved selectivity.
摘要:
A process for producing an indole by catalytic reaction of a 2-(o-aminoaryl)ethanol, said reaction being carried out by heating in a liquid phase in the presence of an alkali metal using a catalyst containing a metal selected from the group consisting of a platinum-group metal, nickel and copper. The process is industrially advantageous in that indoles are produced in high yield.
摘要:
A process for producing an indole by catalytic reaction of a 2-(o-aminoaryl)ethanol, said reaction being carried out by heating in a liquid phase in the presence of an alkali metal using a catalyst containing a metal selected from the group consisting of a platinum-group metal, nickel and copper. The process is industrially advantageous in that indoles are produced in high yield.