Palladium hydroxide-barium sulfat

The hydrobromide of l-(p-hydroxyphenyl)-2-(p-phenylbutylamino)propanone-1 was suspended in very pure methanol and shaken with a 10% palladium hydroxide barium sulfate catalyst in contact with, hydrogen. After rather more than 2 mols of hydrogen had been taken-up the hydrogenation stopped. The l-(p-hydroxyphenyl)-2-(3-phenylbutylamino)propanol-l, was filtered, washed with methanol and evaporated, melting point 110-111°C. 

Palladium hydroxide-barium sulfate Formamidines from carhodiimides... 

Palladium hydroxide-barium sulfate a-Hydroxyketones and 2,3-oxidoalcohols from a,) -oxidoketones... 

Palladium hydroxide-barium sulfate Cleavage of mandelonitrile glycosides... 

Palladium oxide-barium sulfate acetic acid cis-Lactones s. 15, 46 Palladium hydroxide-calcium carbonate Hydrogenation of acetylene derivatives s. 12, 101... 

Palladium-on-charcoal, 274 Palladium hydroxide on barium sulfate, 218 Paraformaldehyde, 284 Pentacene, 132... 

Catalytic reductions have been carried out under an extremely wide range of reaction conditions. Temperatures of 20 C to over 300 C have been described. Pressures from atmospheric to several thousand pounds have been used. Catal3rsts have included nickel, copper, cobalt, chromium, iron, tin, silver, platinum, palladium, rhodium, molybdenum, tungsten, titanium and many others. They have been used as free metals, in finely divided form for enhanced activity, or as compounds (such as oxides or sulfides). Catalysts have been used singly and in combination, also on carriers, such as alumina, magnesia, carbon, silica, pumice, clays, earths, barium sulfate, etc., or in unsupported form. Reactions have been carried out with organic solvents, without solvents, and in water dispersion. Finally, various additives, such as sodium acetate, sodium hydroxide, sulfuric acid, ammonia, carbon monoxide, and others, have been used for special purposes. It is obvious that conditions must be varied from case to case to obtain optimum economics, yield, and quality. 

---