摘要:
The present invention relates to a process for recovering the cobalt carbonyl catalyst used, in which a water-soluble cobalt salt is first prepared by addition of acid and this is subsequently precipitated as cobalt hydroxide. This cobalt hydroxide is then reacted with the N-acyl-.alpha.-amino acid derivative for whose preparation the cobalt carbonyl catalyst is intended, and the resulting cobalt-containing melt is converted into the cobalt carbonyl catalyst in the presence of a mixture of carbon monoxide and hydrogen.
摘要:
A process for the preparation of the formula Ar13−xP[(Ar2(OZ)y]x I wherein Ar1 and Ar2 are individually aromatic of 6 to 20 carbon atoms or heteroaromatic of 4 to 9 carbon atoms, each unsubstituted or substituted with at least one member of the group consisting of halogen, carboxyl, —OH, alkyl of 1 to 6 carbon atoms, phenyl and naphthyl, Ar1 has one valence and R2 has y+1 valences, x is an integer of 1, 2 or 3, y is 1 or 2, Z is carbohydrate with a glycosidic bond comprising reacting a hydrocarbon halide of the formula Z′—X II when Z′ has the definition of Z with —OH protected and X is chlorine, bromine or fluorine with a phosphane of the formula Ar13−xP[(Ar2 (OH)y]x III in a multi-phase reaction medium in the presence of a base and a phase transfer catalyst to form a phosphane of the formula Ar13−xP[(Ar2(OZ1)y]x IV and removal of the protective groups to form a compound of Formula I, metal complexes thereof and various processes.
摘要:
A catalyst comprising rhodium and a compound of the formula (I) in which m is a number from 1 to 1000; x is a number from 0 to 4; W is a group of the formulae —CH2—CH2—, —CH(CH3)CH2—or —CH2CH(CH3)—; R is hydrogen, a straight-chain or branched C1-C5— alkyl radical; or a group of the formulae where a, b, c, d and e independently of one another are a number from 0 to 1000, at least one of the numbers a, b, c, d and e being greater than 0; R5, R6, R7, R8 and R9 are identical or different and are hydrogen, C1-C5-alkyl or a group of the formula R1 and R2 are identical or different and are a straight-chain, branched or cyclic C1-C30-alkyl radical or C6-10-aryl radical, which is unsubstituted or substituted by from one to five C1-C3-alkyl radicals, and L is C1-C5-alkyl, C1-C5-alkoxy, NO2, NR3R4, where R3 and R4 independently of one another are hydrogen or C1-C4-alkyl, or L is Cl or OH, for hydroformylation reactions.
摘要:
The present invention relates to a process for the preparation of aromatic amines of the formula (I) Ar--NR.sup.1 R.sup.2 (I) in which Ar is ##STR1## and R.sup.3 to R.sup.9 independently of one another are hydrogen, C.sub.1 -C.sub.8 -alkyl, alkoxy-(C.sub.1 -C.sub.8), acyloxy-(C.sub.1 -C.sub.8), OAr, Ar, fluorine, chlorine, bromine, iodine, OH, NO.sub.2, CN, CO.sub.2 H, CHO, SO.sub.3 H, SO.sub.2 R, SOR, NH.sub.2, NH-alkyl-(C.sub.1 -C.sub.12), N-alkyl.sub.2 -(C.sub.1 -C.sub.12), NHCO-alkyl-(C.sub.1 -C.sub.12), CO-alkyl-(C.sub.1 -C.sub.12), NHCHO, COAr, CO.sub.2 Ar, CF.sub.3, CONH.sub.2, CHCHCO.sub.2 R, POAr.sub.2, PO-alkyl.sub.2 -(C.sub.1 -C.sub.12), 5-ring heteroaryl, 6-ring heteroaryl, Si-alkyl.sub.3 -(C.sub.1 -C.sub.12), where R=alkyl(C.sub.1 -C.sub.8), aryl(C.sub.5 -C.sub.10) and R.sup.1 and R.sup.2 independently of one another are hydrogen, C.sub.1 -C.sub.12 -alkyl, Ar as defined above, 5-ring heteroaryl, 6-ring heteroaryl, by reacting chloroaromatics of the formula II Ar--Cl (II) with ammonia or primary or secondary amines of the formula III R.sup.1 R.sup.2 NH (III) in which Ar and R.sup.1 and R.sup.2 are as defined above, which comprises reacting the starting materials in the presence of a palladium catalyst, a strong base and a halide cocatalyst in an inert solvent at temperatures of 80.degree.-200.degree. C.
摘要:
The invention relates to a process for preparing monofunctional, bifunctional or polyfunctional aromatic olefins of the formula (I) ##STR1## by reaction of haloaromatics of the formula (II) ##STR2## with olefins of the formula (III) ##STR3## , wherein a palladium compound of the formula (IV) ##STR4## is used as the catalyst.
摘要:
The present invention relates to compounds of the formula ##STR1## in which R.sup.1 and R.sup.2 are identical or different and are hydrogen or an alkyl radical having 1 to 18 carbon atoms and optionally containing oxygen, nitrogen or halogen, the radicals X, Y and Z are identical and are a fluorine, bromine or iodine atom or if two of the radicals X, Y or Z are identical or all of the radicals X, Y, Z are different from each other, X, Y and Z are a fluorine, chlorine, bromine or iodine atom. The invention further relates to a process for the preparation of the compounds, by reacting an aryldiazonium salt of the formula ##STR2## in which the radicals X, Y and Z are identical and are a fluorine, bromine or iodine atom or, if two of the radicals X, Y and Z are identical or all of the radicals X, Y, Z are different from each other, X, Y and Z are a fluorine, chlorine, bromine or iodine atom and A.sup.(-) is an anion of an acid having a pK.sub.a
摘要:
A palladacycle of the formula (I) ##STR1## where: R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are, independently of one another, hydrogen, (C.sub.1 -C.sub.4)-alkyl, (C.sub.1 -C.sub.4)-alkoxy, fluorine, NH.sub.2, NH-alkyl(C.sub.1 -C.sub.4), N(alkyl).sub.2 -(C.sub.1 -C.sub.4), CO.sub.2 -(C.sub.1 -C.sub.4)alkyl, OCO-alkyl-(C.sub.1 -C.sub.4), or phenyl, R.sup.7 and R.sup.8 are, independently of one another, (C.sub.1 -C.sub.8)-alkyl, (C.sub.3 -C.sub.12)-cyloalkyl, substituted or unsubstituted aryl or where R.sup.1, and R.sup.2, R.sup.2 and R.sup.3, R.sup.3 and R.sup.4, R.sup.5 and R.sup.6 together form an aliphatic or aromatic ring, and Y is an anion of an inorganic or organic acid.
摘要:
A process for the preparation of N-acylglycine derivatives of the formula (I) ##STR1## which comprises reacting a carboxylic acid amide with an aldehyde in the presence of a solvent and an acid to give an acylaminomethylol and then carbonylating the acylaminomethylol in the presence of a cobalt carbonyl catalyst.
摘要:
Process for preparing aromatic olefins of the formula (1) ##STR1## in which R.sup.1 -R.sup.3 are hydrogen, alkyl (C.sub.1 -C.sub.8) , alkoxy-(C.sub.1 -C.sub.5), phenyl, fluorine, chlorine, bromine, --OH, --NO.sub.2, --CN, --CHO, --COalkyl(C.sub.1 -C.sub.4) , --COphenyl, --COOalkyl (C.sub.1 -C.sub.4) , --OCOalkyl(C.sub.1 -C.sub.4), --NHCOalkyl(C.sub.1 -C.sub.4) , --CF.sub.3, --NH.sub.2, --NH--alkyl(C.sub.1 -C.sub.4) or --N(alkyl(C.sub.1 -C.sub.4)).sub.2 and R.sup.4 is hydrogen, alkyl(C.sub.1 -C.sub.8), phenyl, fluorine, chlorine, bromine, --OH, --NO.sub.2, --CN, --CHO or --OCOalkyl (C.sub.1 -C.sub.4) , and X is, inter alia, alkenyl(C.sub.2 -C.sub.12) or cycloalkenyl(C.sub.4 -C.sub.8) or the group ##STR2## in which R.sup.5 and R.sup.6 are, independently of one another, hydrogen or methyl, and Y is --phenyl, --CN, --COOH, --COOalkyl(C.sub.1 -C.sub.12), --COOphenyl, ##STR3## --CON (phenyl).sub.2, --COalkyl(C.sub.1 -C.sub.12), --COphenyl, --Oalkyl(C.sub.1 -C.sub.12) , --Ophenyl or the radical ##STR4## in which R.sup.1 -R.sup.4 are as defined above, by reacting an aryldiazonium salt of the formula (2) ##STR5## in which R.sup.1 -R.sup.4 are as defined and Z is the equivalent of an anion of an acid having a pK.sub.a of less than 7, with an olefin of the formula (3)HX (3)
摘要:
Process for preparing 3-(p-fluorophenyl)-2-methylpropionic acid and derivatives thereof of the formula (I), ##STR1## in which R is a hydroxy group, a linear or branched (C.sub.1 -C.sub.8)-alkoxy group, an aryloxygroup, an amino group or a (C.sub.1 -C.sub.8)-alkylamino group or a (C.sub.1 -C.sub.8)-dialkylamino group, by a) converting p-fluoroaniline into the p-fluorophenyldiazonium salt of the formula (II) ##STR2## in which X is the equivalent of an anion of an organic or inorganic acid having a pKa value of less than 7, b) reacting the diazonium salt of the formula (II) with a methacrylic acid derivative of the formula (III) ##STR3## in which R is as defined above in the presence of a palladium catalyst, if desired in the presence of a base and/or a solvent, to give the compounds of the formulae (IV) and (V) in which R is as defined above, ##STR4## and c) hydrogenating the resulting compounds of the formulae (IV) and (V) in the presence of a palladium catalyst with hydrogen.