Abstract: Catalysts for the preparation of carboxylates from an aldehyde and an alkanol in the presence of oxygen, which contain palladium and lead as active components, these being present on a carrier containing zinc oxide, and the palladium being applied as a palladium salt in a solution containing hydrochloric acid and then being liberated by reduction, and whose carrier consists solely of zinc oxide, are particularly active and selective.

Abstract: This invention is a process for producing a carboxylate ester which involves contacting mixtures of alcohol and aldehyde in vapor phase with a reduced silver-cadmium-zinc-zirconium catalyst composition.

Abstract: Methyl derivatives of arachidonic acid and intermediates thereto have been synthesized. These derivatives are inhibitors of SRS-A synthesis and are useful for treating and preventing allergic reactions.

Abstract: Immunogen conjugates comprising N-aminoalkyl derivatives of iodothyronines, e.g., thyroxine and its lower alkyl esters, coupled to an immunogenic carrier material, and antibodies raised against such immunogen conjugates.

Abstract: Vanadium-antimony catalysts have been found to be effective for the vapor phase condensation of saturated monocarboxylic acids or esters with formaldehyde, to produce unsaturated carboxylic acids or esters.

Abstract: Promoted phosphate catalysts have been found to be effective for the vapor phase condensation of saturated monocarboxylic acids or esters with formaldehyde, to produce unsaturated carboxylic acids or esters.

Abstract: A process for producing sorbic acid and its derivatives, which comprises reacting crotonaldehyde with ketene in the presence of a catalyst and decomposing or hydrolyzing the resulting adduct, said catalyst comprising a zinc salt of an aliphatic carboxylic acid and a phosphine or a pyridine.

Abstract: The present invention relates to novel prostaglandin derivatives of the formula I ##STR1## which are structurally related to the naturally occurring prostaglandins and in which R.sup.1 denotes (a) hydrogen or a straight-chain or branched, saturated or unsaturated aliphatic or cycloaliphatic hydrocarbon radical having up to ten carbon atoms or (b) a physiologically acceptable metal or NH.sub.4 ion or an ammonium ion which is derived from a primary, secondary or tertiary amine and R.sup.2 denotes a straight-chain, aliphatic hydrocarbon radical having up to six carbon atoms and to a process for their manufacture.The compounds of the invention are distinguished in particular by gastric acid secretion-inhibiting and ulcer-protective properties.

Abstract: Disclosed are 1-substituted-6-(1-hydroxyethyl)-2-(2-aminoethylthio)-1-carbadethiapen-2-e m-3-carboxylic acids (I) and their pharmaceutically acceptable salts and esters which are useful as antibiotics; such compounds are prepared by total synthesis. ##STR1## wherein R.sup.1 is, inter alia, substituted and unsubstituted alkyl, aryl and aralkyl.

Abstract: Acryloxy- and methacryloxy-alkyl-propanals and a process for their manufacture by esterifying the corresponding .beta.-hydroxyalkylpropanals with acrylic acid and methacrylic acid, respectively, in the presence of an acid esterification catalyst and of an inert diluent.

Abstract: Methacrylic acid and methyl methacrylate are manufactured by reacting, respectively, propionic acid and methyl propionate with dimethoxymethane in the presence of catalysts based on phosphates and/or silicates of magnesium, calcium, aluminum, zirconium, thorium and/or titanium, and in the presence of from 0 to 0.5 mole of water per mole of the acetal.

Abstract: A process for the manufacture of .alpha.,.beta.,.gamma.,.delta.-unsaturated esters containing a very high proportion of the 4(Z)-isomer, which are valuable perfume and flavor materials. The .alpha.,.beta.,.gamma.,.delta.-unsaturated esters are manufactured by a Wittig synthesis from phosphoranes and fumaraldehyde-acid esters under specific conditions.