Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing an amine from a ketone or an alkyl. SOLUTION: This method for producing an amine of the formula (I): R1R2CH- NR3R4 [R1 to R4 are each independently hydrogen, a straight-chain or branched 1-12C alkyl, a 3-12C cycloalkyl, a 6-10C aryl or a 7-11C aralkyl; one or more groups of R1 and R2 are each an aryl or an aralkyl in which an aromatic unit is substituted with one or more halogens] comprises carrying out catalytic and reductive amination of a carbonyl compound of the formula (II): R1-C(=O)-R2 or an alcohol of the formula (III): R1-CH(OH)-R2 with a nitrogen compound of the formula (IV) HNR3R4 [R1 to R4 are each the same as described above] in the presence of Co- and/or Ni-containing catalyst and a solid acid cocatalyst in the absence of an organic sulfur compound.
Abstract:
PROBLEM TO BE SOLVED: To obtain a corresponding alcohol at a high selectivity by selectively hydrogenating a carbonyl compound. SOLUTION: The carbonyl compound represented by formula (I) (wherein R 1 and R 2 are each independently H, a saturated or mono- or polyunsaturated, linear or branched, optionally substituted 1-20C alkyl group, an optionally substituted aryl group, or an optionally substituted heterocyclic group) is subjected to selective liquid phase hydrogenation in the presence of hydrogen and a Pt/ZnO catalyst to produce the corresponding alcohol represented by formula (II) (wherein R 1 and R 2 are each the same as described above). COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing 2-methyl-4-amino-5- aminomethylpyrimidine by starting from β-alkoxypropionitrile of a precursor. SOLUTION: This method for producing the 2-methyl-4-amino-5- aminomethylpyrimidine of formula 1 comprises reacting 2-methyl-4-amino-5- alkoxymethylpyrimidine of formula 2 (wherein, R is a 1-6C alkyl) with ammonia in the presence of a catalyst.
Abstract:
The invention relates to a method for obtaining 3-aminomethyl-3,5,5-trimethyl cyclohexylamine (isophorone diamine, IPDA) with a cis/trans isomer ratio of at least 73/27 by fractional distillation. Said method comprises the following steps: a) preparation of IPDA with a cis/trans isomer ratio /=73/27 and iv) an IPDA fraction with a cis/trans isomer ratio
Abstract:
The present invention relates to a method for producing dialkylamides of the alkali metals by reacting the corresponding dialkylamine with the corresponding alkali metal in the presence of an electron donor substance of the group 1,3-butadiene, isoprene, naphthalene and/or styrene with the formation of low quantities of butenyl dialkylamine. According to said method, the corresponding alkali metal is introduced and suspended in a solvent and the dialkylamine and the electron donor substance are added, such that the dialkylamine is present in an amount up to 45 wt. %, preferably up to 25 wt. %, in particular up to 15 wt. % and the butadiene is present in an amount up to 5 wt. %, preferably up to 3 wt. %, in particular up to 1.5 wt. %.
Abstract:
The invention relates to a method for producing alkylaryl sulfonates, the alkylaryl sulfonates obtained according to said method, alcohol mixtures and olefin mixtures obtained as intermediate products, alkylaromatic compounds obtained therefrom, the use of said alkylaryl sulfonates as surfactants, and detergents containing said surfactants.
Abstract:
The invention relates to a method for producing racemic amines of formula (I ), in which R1 and R2 are not the same and R1, R2, R3 are alkyl-, cycloalkyl-, arylalkyl-, aryl-, heteroaryl rests and heterocyclic rests and R3 also represents hydrogen. Said rests can carry substituents selected from the group of alkyl, cycloalkyl, alkoxy, aryloxy, amino, alkylamino and dialkylamino. The method is characterized in that the corresponding optically active amine (I) and the secondary alcoh ol of formula (II) and/or the asymmetrical ketone of formula (III) and the amine of the formula R3NH2 are simultaneously reacted in situ in the presence of hydrogen and a hydrogenation or dehydrogenation catalyst at an elevated temperature.