摘要:
Process for the preparation of alkyl aryl ethers containing carboxyl groups which are suitable for the preparation of colour film couplers, or derivatives thereof, by reaction of aromatic alcohols with alkyl halides containing carboxyl groups or derivatives thereof and basic alkali metal or alkaline earth metal compounds, characterized in that the reaction is carried out in the melt of the aromatic alcohol.
摘要:
Halogenated aromatic carboxylic acids are decarboxylated by heating them in the presence of water at temperatures of 80.degree. to 180.degree. C. and in the presence of water and other acids at temperatures above 80.degree. C.
摘要:
Alkyl-(3-chlorophenyl)-sulphones are particularly advantageously obtained by chlorination of alkylphenylsulphones if alkylphenylsulphones are chlorinated in molten form with elemental chlorine in the presence of iron(III) chloride and optionally iodine and/or sulphur.
摘要:
The present invention constitutes new 3-[1-(3-haloalkyl)triazolyl]phenyl sulphide derivatives of the formula (I) in which A1, A2, B0, B1, B2, B3, R1, R2 and n are as defined in the description, to their use as acaricides and insecticides for controlling animal pests, and to processes for preparing them.
摘要:
Substituted tetrahydro-naphthalenes and analogous compounds are prepared by reducing or condensing appropriate functional substituents in substituted tetrahydro-naphthalenes and analogous compounds by customary methods and converting functional groups in this manner into the desired groups. The compounds according to the invention are suitable for use as active compounds in pharmaceuticals, in particular in pharmaceuticals for treating arteriosclerosis and also dyslipidaemias.
摘要:
The invention relates to a process for preparing optically active amino alcohols from optically active amino acids by reducing an optically active amino acid with hydrogen in the presence of a ruthenium-containing catalyst and an acid.
摘要:
Process for preparing 2,2-difluoroethylamine derivatives, wherein compounds of the general formula (IV) are hydrogenated to the corresponding 2,2-difluoroethylamine derivatives of the general formula (III), where the A, R1 and R2 radicals are each as defined in the description:
摘要:
The present invention relates to a process for preparing 2,2-difluoroethylamine of the formula (I) and salts thereof, for example sulphates, hydrochlorides or acetates, which proceeds from difluoroacetonitrile.
摘要:
The invention relates to a process for preparing cyclobutanone by oxidizing cyclobutanol with an alkali metal hypochlorite or alkaline earth metal hypochlorite in the presence of an acid.
摘要:
The invention relates to catalysts containing ruthenium and at least one other metal having an atomic number in the range of from 23 to 82 prepared by (a) mixing a suspension of a ruthenium compound having a specific surface area in the range of from 50 to 300 m2/g with a solution of at least one metal compound in which at least one such metal compound contains a metal different from ruthenium and has an atomic number in the range of from 23 to 82, and (b) treating the mixture of the suspension and the solution with a reducing agent.
摘要翻译:本发明涉及含有钌和至少一种原子序数在23至82范围内的其它金属的催化剂,其通过以下步骤制备:(a)混合比表面积为50-300的钌化合物的悬浮液 m 2 / g,其中至少一种金属化合物的溶液,其中至少一种这样的金属化合物含有不同于钌的金属,原子序数在23至82的范围内,和(b)处理悬浮液的混合物 和还原剂的溶液。