Abstract: Noble metal, particularly ruthenium, Raney catalysts which can hydrogenate (1) aromaticity-exhibiting ring portions of organic compounds, (2) carboxylic acids and their ester portions (carbonyl ester groups), (3) ring portions and carboxylic acid or their ester groups in compounds having such ring portions and carboxylic acid or their ester portions, and (4) ring portions and nitrile groups of aromatic nitrile compounds and methods for the preparation of corresponding hydrogenated compounds. The methods allow preparation of hydrogenated compounds having hydrogenated aromatic ring portions, hydrogenated carbonyl ester groups, hydrogenated aromatic ring and carbonyl ester groups, or hydrogenated aromatic rings and nitrile groups under milder hydrogen pressure and temperature conditions than the conventional catalysts.

Abstract: Noble metal, particularly ruthenium, Raney catalysts which can hydrogenate (1) aromaticity-exhibiting ring portions of organic compounds, (2) carboxylic acids and their ester portions (carbonyl ester groups), (3) ring portions and carboxylic acid or their ester groups in compounds having such ring portions and carboxylic acid or their ester portions, and (4) ring portions and nitrile groups of aromatic nitrile compounds and methods for the preparation of corresponding hydrogenated compounds. The methods allow preparation of hydrogenated compounds having hydrogenated aromatic ring portions, hydrogenated carbonyl ester groups, hydrogenated aromatic ring and carbonyl ester groups, or hydrogenated aromatic rings and nitrile groups under milder hydrogen pressure and temperature conditions than the conventional catalysts.

Abstract: Noble metal, particularly ruthenium, Raney catalysts having the property of catalyzing the hydrogenation of (1) aromaticity-exhibiting ring portions of organic compounds, (2) carboxylic acids and their ester portions (carbonyl ester groups), (3) ring portions and carboxylic acid or their ester groups in compounds having such ring portions and carboxylic acid or their ester portions, and (4) ring portions and nitrile groups of aromatic nitrile compounds and methods for the preparation of corresponding hydrogenated compounds. The methods allow preparation of hydrogenated compounds having hydrogenated aromatic ring portions, hydrogenated carbonyl ester groups, hydrogenated aromatic ring and carbonyl ester groups, or hydrogenated aromatic rings and nitrile groups under milder hydrogen pressure and temperature conditions than the conventional catalysts.

Abstract: A process for producing hydrogen peroxide, comprising the step of producing hydrogen peroxide catalytically from hydrogen and oxygen in a reaction medium, wherein a platinum-group metal catalyst is used which comprises a platinum-group metal and, supported thereon, a niobium oxide, a mixed oxide of niobium, a tantalum oxide, a mixed oxide of tantalum, a molybdenum oxide or a tungsten oxide.

Abstract: A benzopyran derivative represented by formula (I): ##STR1## wherein R.sub.0 represents an alkyl or alkenyl group having 10 to 20 carbon atoms, R.sub.1 to R.sub.3 each represent a methyl group or a hydrogen atom, and G represents a --CH.sub.2 CH(OH)CH.sub.2 OH or --CH(CH.sub.2 OH).sub.2 group; or a salt thereof, which has a high water-solubility and thus is usable in cosmetics.

Abstract: A method for producing L-ascorbic acid 2-phosphates, is disclosed which comprises phosphorylating L-ascorbic acid whose hydroxyl groups at the 5- and 6-positions are unprotected or protected with a protective group, or salts thereof, with a phosphorus oxyhalide to form corresponding L-ascorbic acid 2-phosphates, wherein a reaction mixture obtained after the phosphorylation reaction is heated to convert by-products derived from L-ascorbic acid into L-ascorbic acid, which again is subjected to the phosphorylation reaction with the phosphorus oxyhalide. The method produce L-ascorbic acid 2-phosphates in a high yield and at a high purity with simple operations.

Abstract: A process for the preparation of an aminopropylalkoxysilane, which comprises reacting a hydrosilane compound with an allylamine compound in the presence of at least one member selected from the group consisting of phosphorus compounds having a phosphorus-nitrogen bond, which are represented by the following formulae: ##STR1## wherein Z.sup.1, Z.sup.2, Z.sup.3, Z.sup.4, Z.sup.5 and Z.sup.6 independently represent a hydrogen atom, an aliphatic hydrocarbon group having 1 to 8 carbon atoms, an alicyclic hydrocarbon group having 5 to 8 carbon atoms or an aromatic hydrocarbon group,and a rhodium compound.According to this process, the aminopropylalkoxysilane can be prepared in a high yield at a low cost and a high efficiency, while controlling the formation of the .beta.-compound to a very low level.

Abstract: An allyl type amine is prepared by reacting an allyl type alcohol represented by the following formula: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 independently stand for a hydrogen atom, an aliphatic hydrocarbon group or alicyclic hydrocarbon having 1 to 8 carbon atoms, or an aromatic hydrocarbon group,with at least one member selected from the group consisting of ammonia, a primary amine and a secondary amine in the presence of a palladium compound and a multidentate phosphorus compound.