| abstract |
PURPOSE: To obtain the title compound useful as an intermediate for perfumes, agricultural chemicals, and medicines, etc., by partical hydrogenation of a di-substituted acetylene compound, in the presene a poisoned Pd-almina catalyst, hydroxide of an alkaline (earth) metal, or a basic salt, and water. n CONSTITUTION: The compound of formula R 1 C≡CR 2 (R 1 and R 2 are hydrocarbon groups without triple bonds, e.g. alkyl, aryl, etc., possibly substituted with OH or COOH, etc.,) is hydrogenated partly in the presence of a Pd poisoned with zinc, lead, tin, etc. in an amount of 0.05W5wt% based on the raw material, supported on alumina, hydroxide of an alkaline (earth) metal or basic salt in an amount of 0.05W10wt% based on the raw material, and water in an amount of 0.1wt% based on the raw material or more, at 20W200°C to obtain the title compound. n EFFECT: Selective production of the object compound in high yield, and simple separation and removal of the catalyst. n COPYRIGHT: (C)1980,JPO&Japio |