摘要:
The present invention relates to a continuous adiabatic process for preparing nitrochlorobenzene in the presence of phosphoric acid. The waste acid produced during the practice of the process is reconcentrated and recycled into the nitration reaction.
摘要:
The present invention relates to a continuous isothermal process for preparing mononitrotoluenes in the presence of a mixed acid component comprising mixtures of sulfuric acid and phosphoric acid with concentration of the resultant waste acid and recycling of the concentrated waste acid to the process.
摘要:
What is described is a process for preparing organic compounds of the general formula (I) R—R′ (I) by converting a corresponding compound of the general formula (II) R—X (II) in which X is fluorine, chlorine, bromine or iodine to an organomagnesium compound of the general formula (III) [M+]n[RmMgXkY1] (III) wherein compounds of the formula (III) are reacted with a compound of the general formula (IV) characterized in that the reaction of (III) with (IV) is performed in the presence of a) catalytic amounts of an iron compound, based on the compound of the general formula (II), and optionally in the presence of b) a nitrogen-, oxygen- and/or phosphorus-containing additive in a catalytic or stoichiometric amount, based on the compound of the general formula (II).
摘要翻译:描述的是通过将相应的通式(II)RX(II)的化合物(其中X是氟,氯,溴或溴)或其盐,其中R 1,R 2, 碘与通式(III)的化合物(III)反应的通式(III)的有机镁化合物[M +] n [RmMgXkY1](III)其中式(III)化合物与通式(IV)的化合物反应,其特征在于(III )与(IV)化合物在(a)催化量的铁化合物(基于通式(II)的化合物)存在下进行,任选在b)氮,氧和/或磷 基于通式(II)的化合物,催化剂或化学计量的添加剂。
摘要:
This invention relates to a process for preparing functionalized aryl, heteroaryl, cycloalkenyl, or alkenyl compounds, by a transition-metal-catalyzed cross-coupling reaction of a substituted or unsubstituted aryl-X, heteroaryl-X, cycloalkenyl-X or alkenyl-X compound with an alkyl, alkenyl, cycloalkyl or cycloalkenyl halide, where X is a halide, diazonium, tosylate (p-toluenesulphonate), mesylate (methanesulphonate) or triflate (trifluoromethanesulphonate) leaving group.
摘要:
What is described is a process for preparing organic compounds of the general formula (I) R—R′ (I) by converting a corresponding compound of the general formula (II) R—X (II) in which X is fluorine, chlorine, bromine or iodine to an organomagnesium compound of the general formula (III) [M+]n[RmMgXkY1] (III) wherein compounds of the formula (III) are reacted with a compound of the general formula (IV) characterized in that the reaction of (III) with (IV) is performed in the presence of a) catalytic amounts of an iron compound, based on the compound of the general formula (II), and optionally in the presence of b) a nitrogen-, oxygen- and/or phosphorus-containing additive in a catalytic or stoichiometric amount, based on the compound of the general formula (II).
摘要翻译:描述的是通过将相应的通式(II)化合物R-X(II)转化为其中X为氟,氯,氯, 溴或碘与通式(III)的有机镁化合物[M +] n [RmMgXkY1](III)反应,其中式(III)化合物与通式(IV)的化合物反应,其特征在于: (III)与(IV)的化合物在a)催化量的铁化合物存在下进行,基于通式(II)的化合物,并且任选在b)氮,氧和/ 或基于通式(II)的化合物的催化或化学计量的含磷添加剂。
摘要:
Described is a process for preparing diaryl ethers of the formula (I) Ar—O—Ar′ (I) In which Ar is an aryl or substituted aryl group and Ar′ is an aryl, substituted aryl, heteroaryl or substituted heteroaryl group,by reacting an aryl of formula (II) or a aryloxy salt of formula (III) Ar—OH (II) Ar—OR (III) In which Ar has the same meaning as in formula (I) and R is an alkali metal,with an aryl or heteroaryl bromide of formula (IV) Ar′—Br (IV) In which Ar′ has the same meaning as in formula (I),characterized in that the reaction is carried out in the presence of a copper(I)salt and a 1-substituted imidazole as catalyst system.
摘要:
A process for preparing ketones of the general formula (III) where R is an optionally substituted carbocyclic aromatic radical having 6 to 24 carbon atoms or an optionally substituted alkyl radical or an optionally substituted heteroaromatic radical having 5 to 24 carbon atoms, and R1 is an optionally substituted carbocyclic aromatic radical having 6 to 24 carbon atoms or an optionally substituted heteroaromatic radical having 5 to 24 carbon atoms, by reacting alpha-oxo carboxylates of the general formula (I) wherein n and m is a number in the range from 1 to 6, M(m+) is a cation, and R has the meaning indicated for formula (III), with aryl bromides of the general formula (II) R1—Br (II) where R1 has the meaning indicated for formula (III), in the presence of two transition metals or compounds thereof as catalyst, is described.
摘要:
The present invention relates to a process for the production of trifluoromethylated unsubstituted or substituted aryl or heteroaryl compounds which comprises reacting an unsubstituted or substituted aryl or heteroaryl halide with a trifluoroacetate of formula (I) or (II), wherein R1 is hydrogen or a C1-C5 alkyl group and M an alkali metal or an ammonium ion, in the presence of and an anorganic halogenide salt or a trifluoroacetacid salt as activator compound and a catalytic combination of a copper salt with a monodentate, bidentate or tridentate aromatic or aliphatic amine or pyridine ligand.