Abstract: Agricultural fungicidal compositions containing as an active ingredient one or more 4-aminoquinazoline derivatives. The amino group is substituted, e.g., with a phenoxyalkylene, and the quinazoline nucleus may be substituted at 2- and or 6-positions.

Abstract: 4-Aminoquinazoline derivatives of formula (I): ##STR1## (wherein: R.sup.1 represents an alkyl group, a cycloalkyl group, an alkenyl group or a benzyl group;R.sup.2 and R.sup.3 are the same or different and each represents a hydrogen atom, an alkyl group, an alkoxy group or a halogen atom;X represents a straight or branched chain alkylene group; andn is 0 or 1)and salts and hydrates thereof are valuable fungicidal, anti-insect (insect-repellent and insecticidal) and acaricidal compounds and thus can be used to treat or prevent many diseases affecting agricultural and horticultural plants, while, at the same time, having a much lower toxicity to fish than is exhibited by other known compounds.

Abstract: A process for preparing a diester of malonic acid which comprises reacting ketene and carbon monoxide with an ester of nitrous acid catalytically in the presence of metallic palladium or a salt thereof.

Abstract: A process for preparing a diester of oxalic acid which comprises bringing carbon monoxide into contact with an ester of nitrous acid or with an alcohol and a nitrogen oxide or a hydrate of the nitrogen oxide in the gaseous phase in the presence of a solid catalyst containing metallic palladium or a salt thereof, a gas containing molecular oxygen being introduced into the reaction system in cases where said nitrogen oxide or a hydrate of the nitrogen oxide requires molecular oxygen together with the alcohol to form an ester of nitrous acid.

Abstract: A process for preparing a diester of oxalic acid which comprises bringing carbon monoxide into contact with an ester of nitrous acid in the liquid phase, in the presence of metallic palladium or a salt thereof, preferably with introduction of a gas containing molecular oxygen into the reaction system, more preferably with further incorporation of an alcohol in the reaction system.

Abstract: Agricultural fungicidal compositions containing as an active ingredient one or more 4-aminoquinazoline derivatives. The amino group is substituted, e.g., with a phenoxyalkylene, and the quinazoline nucleus may be substituted at 2- and or 6-positions.

Abstract: Disclosed is a process for separating 11-cyanoundecanoic acid, cyclohexanone and .epsilon.-caprolactam from a pyrolysis product obtained by pyrolyzing 1,1'-peroxydicyclohexylamine in the presence of steam at a temperature of 300.degree. to 1,000.degree. C. The pyrolysis product is first contacted with a mixture comprised of aqueous ammonia and at least one organic solvent selected from benzene, toluene and xylene, and the so prepared liquid is separated into the oily layer and the aqueous layer. On one hand, the oily layer is distilled to separate cyclohexanone therefrom. On the other hand, the aqueous layer is acidified to a pH of below 4.0 by adding thereto a mineral acid and maintained at a temperature of 40.degree. to 100.degree. C. to separate crude 11-cyanoundecanoic acid in molten form from the aqueous layer, and then, the separated crude molten 11-cyanoundecanoic acid is washed with hot water to extract .epsilon.-caprolactam therefrom.

Abstract: 11-cyano-undecanoic acid having a high purity of 99% or more is obtained by the steps of dissolving a crude 11-cyano-undecanoic acid in the form of free acid or its ammonium salt into a mixture solvent consisting of acetic acid or propionic acid and water in a mixing ratio by weight of 1 : 0.05 to 3; bringing a refining gas containing therein ozone into contact with said solution in order to decompose impurities, especially, coloring substances in said solution, and; crystallizing and separating the purified 11-cyano-undecanoic acid from said solution.

Abstract: A crude 11-cyano-undecanoic acid in the form of the free acid or its ammonium salt is refined by bringing a refining gas containing ozone therein into contact with a solution of the crude 11-cyano-undecanoic acid or its ammonium salt in a substantially anhydrous organic solvent which is non-reactive with the ozone at a temperature of 0.degree. to 100.degree. C, for example, formic acid, acetic acid, propionic acid, chloroform, tetrachloromethane, dichloroethane or trichloroethane.

Abstract: 11-CYANO-UNDECANOIC ACID IS ISOLATED IN ITS AMMONIUM SALT IN A HIGH PURITY FROM A CRUDE MATERIAL BY THE METHOD WHEREIN THE CRUDE MATERIAL CONTAINING 11-CYANO-UNDECANOIC ACID IS DISSOLVED IN AN ORGANIC SOLVENT CONSISTING OF ONE OR MORE AROMATIC HYDROCARBONS HAVING 6 TO 8 CARBON ATOMS, AMMONIUM GAS IS INTRODUCED INTO THE CRUDE MATERIAL SOLUTION TO CONVERT THE DISSOLVED 11-CYANO-UNDECANOIC ACID ITS AMMONIUM SALT, CRYSTALS AND, THEREAFTER, THE CRYSTALS OF AMMONIUM SALT ARE SEPARATED FROM THE SOLUTION.

Abstract: Therapeutic levels of L-DOPA are achieved by orally administering a pharmaceutical effervescent-enteric coated tablet comprising:A. a member selected from the group consisting of L-DOPA or a derivative thereof capable of enzymatically cleaving and reverting to L-DOPA in vivo,B. a non-toxic pharmaceutically acceptable inert diluent,C. a non-toxic pharmaceutically acceptable carbon dioxide releasing agent,D. a non-toxic pharmaceutically acceptable effervescing agent, andE. a non-toxic pharmaceutically acceptable enteric coating.This composition is extremely useful in the treatment of Parkinsonism. When administered to warm-blooded animals (e.g., humans), superior therapeutic blood levels of L-DOPA are observed over that normally observed with conventional enteric coated formulations.