摘要:
The invention relates to a process for preparing monofunctional, bifunctional and polyfunctional aromatic olefins of the formula (I) by reacting haloaromatics of the formula (II) with olefins of the formula (III) wherein a palladium compound of the formula (IV) is used as catalyst.
摘要:
The invention relates to a process for the preparation of bipyridyls by converting at least one pyridine of the formula (III) in which S′, S″, S′″, S″″ and S′″″, independently of one another, are identical or different and are hydrogen, (C1-C18)-alkyl, alkoxy-(C1-C18), acyloxy-(C1-C18), aryloxy-(C1-C18), perfluoroacyloxy-(C1-C8), NO2, (C1-C18)-aryl, (C1-C18)-heteroaryl, halogen, hydroxyl, nitro, nitroso, CN, COOH, CHO, PO3H2, SO3H, SO2R, SOR, NH2, NH-alkyl-(C1-C18), N-alkyl2-(C1-C18), protected amine, CF3, NHCO-alkyl-(C1-C4), N-alkyl-(C1-C4)-CO-alkyl-(C1-C4), COO-alkyl-(C1-C18), CONH2, CO-alkyl-(C1-C18), NHCOH, NHCOO-alkyl-(C1-C4), CO-(C1-C18)-aryl, COO-(C1-C18)-aryl, CHCH-CO2-alkyl-(C1-C18), CHCHCO2H, PO-phenyl2, PO-alkyl2-(C1-C4), (COO−)n(cation)n+, (PO32−)n(cation)2n+, (SO3−)n(cation)n+ and/or (O−)n(cation)n+, where optionally S′, S″, S′″, S″″ and/or S′″″ among one another together form one or more aliphatic and/or aromatic rings and/or in which optionally S′, S″, S′″, S″″and/or S′″″forms a bridge to at least one further pyridine of the formula (III) and/or in which optionally the radicals S′, S″, S′″, S″″, and/or S′″″ have the meanings given above and are substituted by at least one radical which has the meaning given above for S′, S″, S′″, S″″ and/or S′″″ in water in the presence of an alcohol, a base, a palladium catalyst and optionally one or more further solvents at a temperature of 0-200° C.
摘要:
The present invention relates to a process for recovering cobalt carbonyl catalysts used in the preparation of N-acyl-alpha-amino acid derivatives by amidocarbonylation comprising the process steps:adding aqueous hydrogen peroxide solution to the reaction solution present after the preparation of the N-acyl-.alpha.-amino acid derivative,then separating the aqueous phase containing water-soluble cobalt(II) salt from the nonaqueous product-containing phase,subsequently adding an alkali metal salt of the N-acyl-alpha-amino acid derivative to the aqueous phase from the previous process step,then separating off the precipitated cobalt salt of the N-acyl-alpha-amino acid derivative, andfinally converting the resulting cobalt salt of the N-acyl-alpha-amino acid derivative into the cobalt carbonyl catalyst in the presence of a mixture of carbon monoxide and hydrogen.
摘要:
The invention relates to palladaphosphacyclobutanes of the formula (I) ##STR1## where R.sup.1, R.sup.2 are, independently of one another, hydrogen, (C.sub.1 -C.sub.4)-alkyl, (C.sub.3 -C.sub.12)-cycloalkyl, (C.sub.1 -C.sub.4)-alkoxy, fluorine, N[(C.sub.1 -C.sub.4)-alkyl].sub.2, CO.sub.2 -(C.sub.1 -C.sub.4)-alkyl, OCO-(C.sub.1 -C.sub.4)-alkyl or aryl;R.sup.3, R.sup.4, R.sup.5, R.sup.6 are, independently of one another, (C.sub.1 -C.sub.8)-alkyl, (C.sub.3 -C.sub.12)-cycloalkyl or aryl;or where R.sup.1 and R.sup.2, R.sup.1 or R.sup.2 and R.sup.3 or R.sup.4, R.sup.3 and R.sup.4, R.sup.3 or R.sup.4 and R.sup.5 or R.sup.6, or R.sup.5 and R.sup.6 together form an aliphatic ring; or where R.sup.5 and R.sup.6, R.sup.3 or R.sup.4 and R.sup.5 or R.sup.6 together form an aromatic ring; andY is an anion of an inorganic or organic acid, with the exception of the compoundsdi-.mu.-chloro-bis[2-[bis(1,1-dimethylethyl)phosphino]-2-methylpropyl-C,P]dipalladium(II)di-.mu.-bromo-bis[2-[bis(1,1 -dimethylethyl)phosphino]-2-methylpropyl-C,P]dipalladium(II)di-.mu.-trifluoroacetato-bis[2-[bis(1,1 -dimethylethyl)phosphino]-2-methylpropyl-C,P]dipalladium(II)di-.mu.-chloro-bis[2-[(1,1 -dimethylethyl)phenylphosphino]-2-methylpropyl-C,P]dipalladium(II).mu.-chloro-.mu.-methoxy-bis[2-[bis(1,1 -dimethylethyl)phosphino]-2-methylpropyl-C,P]dipalladium(II).
摘要:
Good yields and selectivities are achieved in a process for preparing an isochroman-3-one of the formula (I) ##STR1## by reacting a 1,3-dihydroisobenzofuran of the formula (II) ##STR2## with carbon monoxide at a CO pressure of from 0.1 to 20 MPa in the presence of an ionic halide, a palladium catalyst and a dipolar aprotic solvent.
摘要:
Bidentate phosphine ligands of the formula wherein the substituents are as defined in the specification and a process for preparing linear aldehydes by hydroformylating internal olefins using such phosphine ligands.
摘要:
A process for preparing phenylacetic acid derivatives of the formula (I) by reacting benzyl chlorides of the formula (II) with a compound of the formula R6OH and with carbon monoxide in a dipolar aprotic solvent in the presence of a catalyst which comprises at least one compound of a transition metal of subgroup VIII of the Periodic Table of the Elements, where R1, R2, R3, R4, and R5 independently of one another are the following radicals: a hydrogen or fluorine atom; a CH2Cl radical; a HO2CCH═CH—, NC— or CF3— group; an alkyl, alkoxy or acyloxy radical having in each case 1 to 18 carbon atoms; or a C6-C18-aryloxy, aryl or heteroaryl radical.
摘要:
The present invention relates to a process for preparing an isochroman-3-one of the formula (I) by reacting a 1,2-bishalomethylbenzene of the formula (II) ##STR1## in which X is chlorine, bromine or iodine with carbon monoxide and water at a CO pressure of from 0.1 to 50 MPa and a temperature of from 20 to 200.degree. C. in the presence or absence of an ionic halide, in the presence of a palladium catalyst and a dipolar aprotic solvent, where in the formulae (I) and (II) the radicals R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently of one another denote:a hydrogen or fluorine atom;a HO.sub.2 CCH.dbd.CH--, NC-- or F.sub.3 C group;an alkyl, alkoxy or acyloxy radical having in each case 1 to 18 carbon atoms; or a C.sub.6 -C.sub.18 -aryloxy, aryl or heteroaryl radical, where the heteroatoms present are 1 to 3 atoms from the group O, N and/or S;a R.sup.5.sub.2 P(.dbd.O)--, R.sup.6 C(.dbd.O)--, R.sup.6 OC(.dbd.O)--, R.sup.6 OC(.dbd.O)CH.dbd.CH--, R.sup.7 C(.dbd.O)--, R.sup.7 OC(.dbd.O)CH.dbd.CH-- or R.sup.7.sub.2 P(.dbd.O) radical; in which R.sup.5 is a C.sub.1 -C.sub.4 -alkyl radical, R.sup.6 is a C.sub.1 -C.sub.18 -alkyl radical and R.sup.7 is a C.sub.6 -C.sub.18 -aryl radical; or in which at least one of the radicals R.sup.1, R.sup.2, R.sup.3 and R.sup.4 is substituted by a radical R.sup.8, where R.sup.8 has the same meaning as R.sup.1 ; or where at least two of the radicals R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are linked with one another and form at least one aliphatic or aromatic ring having 5 to 18 carbon atoms.
摘要:
Biaryls, e,g,. biphenyls, phenylpyridines, phenylfurans, phenylpyrroles, phenylthiophenes, bipyridines, pyridylfurans or pyridylpyrroles are prepared in high yields by coupling aromatics with an aromatic boric acid or boric ester in the presence of a palladaphosphacyclobutane catalyst.
摘要:
Aromatic amines of the formula (I) Ar—[NR6R7]n (I) are prepared by reacting a haloaromatic of the formula (II) Ar—Hal (II) with an amine of the formula (III) R6R7NH (III) in the presence of a palladaphosphacyclobutane and a base and in the presence or absence of an ionic halide in a solvent at temperatures of from 20 to 200° C.