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:
Process for the telomerization of dienesThe present invention relates to a process for the telomerization of dienes, according to which the diene is reacted with a compound containing an active hydrogen atom in the presence of a palladium compound, a water-soluble phosphine ligand and a base, the water-soluble ligand being a bidentate ligand having the following formula I ##STR1## in which R is identical or different and is phenyl, C.sub.1 -C.sub.12 -alkyl or C.sub.3 -C.sub.10 -cycloalkyl, which may be unsubstituted or substituted by one or more radicals R',R' is identical or different and is SO.sub.3.sup.- M.sup.+, --NMe.sub.3.sup.+ or --COO.sup.- M.sup.+,n is an integer from 1 to 6, in each case based on a naphthyl backbone, andM is H, Na, K, Cs or R".sub.4 N.sup.+ where R" is identical or different and is H, C.sub.1 -C.sub.12 -alkyl or C.sub.1 -C.sub.10 -cycloalkyl.
摘要:
Disclosed and claimed are oxidation reactions involving, as a catalyst, a bis- and/or tris-(.mu.-oxo)-dimanganese complex salt of the formula I[LMn(.mu.-O).sub.a (.mu.-OAc).sub.b MnL].sup.x A.sub.y (I)Ac is a C.sub.2 -C.sub.8 -acyl group,a is 1, 2 or 3,b is 0 when a is 2 or 3 or b is 2 when a is 1,x indicates the number of positive charges and is 2 or 3,A is a singly or doubly negatively charged anion,y is the number of anions A required to balance the positive charges andL is a ligand, such as N,N-bis(2-pyridylmethyl)-N-methylamine or N,N,N',N'-tetrakis(2-pyridyl(methyl)-N-methylamine or N.sub.1 N.sub.1 N.sub.1, N.sup.1 -tetrakis(2-pyridylmethyl)-1,2-ethylenediamine.
摘要:
Bleach systems comprising bis- and tris(.mu.-oxo)dimanganese complex salts as catalystBis- and tris(.mu.-oxo)dimanganese complex salts of the formula�LMn(.mu.-O).sub.a (.mu.-OAc).sub.b MnL!.sup.x A.sub.yas catalysts for oxidizing organic compounds, in which formulaAc is a C.sub.2 -C.sub.8 -acyl group,a is 1, 2 or 3,b is 0 if a is 2 or 3 or is 2 if a is 1,x denotes the number of positive charges and is 2 or 3,A is an anion,y is the equivalent amount of anion A required to compensate the positive charges, andL is a ligand, preferably N,N'-bis(2-pyridylmethyl)-N-methylamine or N,N,N',N'-tetrakis(2-pyridylmethyl)-1,2-ethylenediamineare employed as catalysts in bleach systems for textile material.
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 chiral manganese-triazonone complex of the general formula (I) is disclosed: �Mn.sub.u (L).sub.V (OR).sub.W (.mu.-O).sub.X (.mu.OAc).sub.y !X.sub.z(I) The complex is useful industrially to prepare chiral compounds.