A palladium/magnesium‐lanthanum mixedoxidecatalyst is found to be an efficient heterogeneous catalyst for the chemoselectivehydrogenation of olefinic double bonds in the presence of various functional groups. The catalyst was recovered by centrifugation and reused for several cycles with consistent activity and selectivity.
Palladium-supported ionic liquid catalyst (Pd-SH-SILC) immobilized on mercaptopropyl silica gel as a chemoselective, reusable and heterogeneous catalyst for catalytic hydrogenation
Palladium acetate was immobilized as Pd-SH-SILC (Pd-supported ionic liquid catalyst) in the pores of amorphous mercaptopropyl silicagel with the aid of an ionic liquid [bmim]BF4. The heterogeneous Pd-SH-SILC was effective for catalytic hydrogenation of a variety of olefins at atmospheric pressure and room temperature. It withstood recycling up to 10 times by decantation.
Conjugate Reduction of α,β-Unsaturated Carbonyl Compounds Promoted by Nickel Nanoparticles
作者:Miguel Yus、Francisco Alonso、Iñaki Osante
DOI:10.1055/s-2006-951494
日期:2006.11
The system composed of nickel(II) chloride, lithium metal, a catalytic polymer-supported arene, and ethanol, has been efficiently applied to the conjugate reduction of a variety of α,β-un-saturated carbonylcompounds (ketones and carboxylic acid derivatives) under very mild reaction conditions.
The Transformations of Terpene Eetones by Oxygen. II. The Base-catalyzed Autoxidation of Pulegone and Fukinone and Their Dihydro Compounds
作者:Akio Horinaka、Eiyu Yo、Otoji Mori、Keizo Naya
DOI:10.1246/bcsj.52.2372
日期:1979.8
Upon autoxidation in alkaline media, pulegone and fukinone (2) gave pairs of hydroxy ketones respectively as the major products; also, hydroxyeremophilone was isolated as its acetate from 2. On the other hand, their dihydro compounds afforded hydroxy ketones, diosphenols, and acids.
PROCESS FOR MAKING NEO-ENRICHED p-MENTHANE COMPOUNDS
申请人:Erman Mark B.
公开号:US20120116113A1
公开(公告)日:2012-05-10
A process for making neo-enriched p-menthane intermediates is disclosed. Lewis acid-catalyzed rearrangement of an oxaspiro compound provides an aldehyde mixture comprising normal (II) and neo (III) p-menthane-3-aldehydes:
with the neo aldehyde (III) as the major product. The aldehyde mixture is readily oxidized to provide the corresponding carboxylic acids, and the acids are easily converted to a host of neo-enriched p-menthane esters or amides. The esters and amides are valuable as physiological coolants.