摘要:
The present invention relates to novel nitrogen-containing monodentate phosphane ligands of formula (I) and to their use in catalytic reactions, especially in the improvement of haloaromatic compounds.
摘要:
The present invention is aimed at a process for the preparation of (hetero)aromatic aldehydes. The aldehydes are obtained from corresponding Hal′-substituted (hetero)aromatics by palladium-catalysed reductive carbonylation in the presence of a specific monodentate phosphane-based ligand system.
摘要:
The present invention relates to a process for the epoxidation of olefins using catalysts based on ruthenium complexes in the presence of hydrogen peroxide.
摘要:
The present invention relates to a catalyst based on ruthenium complexes and to a process for the asymmetric epoxidation of olefins using catalysts based on ruthenium complexes.
摘要:
Diphosphine of formula I R1R2P—H2C—Ar—CH2PR1R2 (I) are prepared by a process that comprises a) reacting a dimethyl compound of formula II H3C—Ar—CH3 (II) with a base and an N-substituted aminophosphorous halide to form bis(aminophosphinomethyl) compound of the formula III R3R4P—H2C—Ar—CH2—PR3R4 (III) b) reacting the compound of formula III with HCl to form bis(dichlorophosphinomethyl) compound of formula IV Cl2P—H2C—Ar—CH2—PCl2 (IV) and c) reacting the compound of formula IV with an organometallic reagent to give the product compound of formula I, wherein groups R1 and R2 are each, independently of one another, a substituted or unsubstituted aromatic, heteroaromatic or aliphatic hydrocarbon group and may have a covalent bond connecting them and Ar is a substituted or unsubstituted aromatic or heteroaromatic hydrocarbon group an R3 and R4 are each, independently of one another, an N-substituted alkylamino or arylamino group.
摘要:
This invention relates to process for dihydroxylation of olefins using transition metal catalysts to obtain monofunctional, bifunctional, and/or polyfunctional 1,2-diols of the formula (I) R1R2C(OH)—C(OH)R3R4 (I) where R1 to R4 are defined herein, by reacting an olefin of the formula (II) R1R2C═CR3R4 (II) where R1 to R4 are defined as for formula (I), with molecular oxygen in the presence of an osmium, ruthenium, or manganese compound in water or a water-containing solvent mixture at a pH of from 7.5 to 13.
摘要:
Process for preparing monofunctional, bifunctional and/or polyfunctional biaryls of the formula (I) Ar—Ar′ (I) by reacting haloaromatics of the formula (II) Ar—X (II) with boron compounds of the formula (IIIa), (IIIb) and/or (IIIc) in the presence of at least one palladium complex of the formula (IVa) or (IVb)
摘要:
Process for the preparation of N-acetyl protected amino acids of Formula I by amido carbonylation utilizing carbon monoxide, nitrile, and an aldehyde in the presence of a metal catalyst.
摘要:
The invention relates to a process for preparing aromatic acetylenes of the formula (I): Ar--C.tbd.C--R.sup.8a, where Ar is: ##STR1## by reacting haloaromatics or aryl sulfonates of the formula (II): Ar--X, with monosubstituted acetylenes of the formula (III): Ar--C.tbd.C--R.sup.8a, where Ar is defined above and X is bromine, chlorine or OSO.sub.2 R, in the presence of a palladium compound catalyst of the formula (IV): ##STR2## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, 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 -alkyl-(C.sub.1 -C.sub.4), OCO-alkyl-(C.sub.1 -C.sub.4), or phenyl, or 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 R.sup.7, R.sup.8 are (C.sub.1 -C.sub.8)-alkyl, (C.sub.3 -C.sub.12)-cycloalkyl, substituted or unsubstituted aryl, and Y is an anion of an inorganic or organic acid.
摘要:
The present invention relates to a process for deuteration of amines in the alpha and/or beta position of the N-atom by using a deuterium source and a Ruthenium(II) based catalyst.