Showing papers on "Selective reduction published in 1970"

Selective reduction of 2-ene-1,4-diones and 2-en-1-ones with di-i-butylaluminium hydride

Abstract: Reduction of 2-ene-1,4-diones and 2-enones with di-i-butylaluminium hydride provides the corresponding unsaturated alcohols in excellent yields and this reagent appears to be superior to other metal hydrides including aluminium hydride.

Phthalic acid purification with copper activated palladium on carbon catalysts

Abstract: Elemental noble metals of the platinum group as reduction catalysts are known from the work of E. B. Maxted and A. Marsden reported in J. Chem. Soc. (1940) pages 469-474 to tend to be deactivated by copper. However the alloying of copper with palladium deposited on carbon in the respective weight ratio of less than 0.5:1.0 substantially enhances the catalytic activity of that palladium reduction catalyst especially the selective reduction of formylbenzoic acid impurities in crude phthalic acid products.

Selective reduction of nitroaromatic compounds

Abstract: The use of sodium hydrosulphide as a selective reducing agent for aromatic nitro-groups has been investigated with respect to experimental details (including solvent) and yield and ease of purification of product, via studies on the x,y′-dinitrobiphenyls (x= 2–4, y= 2–4). The hydrosulphide-induced reduction is superior to previously reported methods. Its advantages and possible applications are discussed.

Process for the selective reduction of 6-methylene-3-keto-{66 {11 -steroids

Abstract: A novel process for the selective reduction of 6-methylene-3-keto- DELTA 4-steroids with a palladium catalyst to obtain the corresponding 6-methyl-3-keto- DELTA 5-steroid which is isomerized in the presence of an acid or a base to obtain the desired 6 alpha -methyl-3-keto- DELTA 4-steroid.