Abstract:
The present invention relates to the compound of dialkyl(2-alkoxy-6-aminophenyl)phosphine and the preparation method thereof and the application in the palladium catalyzed coupling reactions of aryl chloride and ketone. The dialkyl(2-alkoxy-6-aminophenyl)phosphine of the present invention could coordinate with the palladium catalyst to highly selectively activate the inert carbon-chlorine bond, and to catalyze direct arylation reaction in the α-position of ketones to produce corresponding coupling compounds. The preparation method of the present invention is a simple one-step method which produces the air-stable dialkyl(2-alkoxy-6-aminophenyl)phosphine. Compared with the synthetic routes of ligands to be used in the activation of carbon-chlorine bonds in the prior arts, the preparation method of the present invention has the advantages of short route and easy operation.
Abstract:
The invention provides a method of carrying out a Lewis-acid catalysed organic reaction in the presence of a Lewis acid catalyst comprising a metal-organic compound having the following formula: M(HO(CR1R2)z)a(O(CR1R2)z)bY—(CR3R4)χ-Y((CR1R2)zO)c((CR1R2)zOH)d.nR5OH (Formula I) in which: M is a metal atom, preferably titanium, zirconium, hafnium or iron (III) Y is selected from P and N, but Ss very preferably N; each R1, R2, R3 and R4 is independently selected from H, alkyl, aryl, substituted alkyl or substituted aryl, R5 is hydrogen, an alkyl group, a hydroxy-functionalised alkyl group, a polyoxyalkylmoiety, R6O or R7COO where R6 and R7 may each represent H, alkyl, aryl or alkyl-aryl; d and a are each O or 1, b and c are each 1 or 2, b+c=the valency of M, a+b+c+d=4, each z is independently 1, 2, 3 or 4; x represents the least number of C atoms between the Y atoms and is 2 or 3 and n is a number in the range from 0 to 4. The metal-organic compound forms a stable hydrate in water which retains Lewis-acid catalytic properties.
Abstract translation:本发明提供一种在路易斯酸催化剂存在下进行路易斯酸催化的有机反应的方法,该路易斯酸催化剂包含具有下式的金属有机化合物:M(HO(CR 1 R 2)z)a(O(CR 1 R 2)z) bY-(CR3R4)χ-Y((CR1R2)zO)c((CR1R2)zOH)d.nR5OH(式I)其中:M是金属原子,优选钛,锆,铪或铁(III)Y是 选自P和N,但S优选为N; 每个R 1,R 2,R 3和R 4独立地选自H,烷基,芳基,取代的烷基或取代的芳基,R 5是氢,烷基,羟基官能化的烷基,聚氧烷基摩尔,R6O或R7COO,其中R6和R7可以 各自表示H,烷基,芳基或烷基 - 芳基; d和a各自为O或1,b和c各自为1或2,b + c = M的化合价,a + b + c + d = 4,每个z独立地为1,2,3或4; x表示Y原子之间的C原子数最少,为2或3,n为0至4的数。该金属有机化合物在水中形成稳定的水合物,保留路易斯酸催化性能。
Abstract:
A catalyst of the invention includes an imide compound having a N-substituted cyclic imide skeleton represented by following Formula (I): wherein R is a hydroxyl-protecting group. Preferred R is a hydrolyzable protecting group. R may be a group obtained from an acid by eliminating an OH group therefrom. Such acids include, for example, carboxylic acids, sulfonic acids, carbonic acid, carbamic acid, sulfuric acid, nitric acid, phosphoric acids and boric acids. The catalyst may include the imide compound and a metallic compound in combination. In the presence of the catalyst, (A) a compound capable of forming a radical is allowed to react with (B) a radical scavenging compound and thereby yields an addition or substitution reaction product of the compound (A) and the compound (B) or a derivative thereof. This catalyst can produce an organic compound with a high selectivity in a high yield as a result of, for example, an addition or substitution reaction under mild conditions.
Abstract:
Supported heterogeneous organotin catalysts of the formula X1, X2, or X3: wherein Z is a spacer group; Y is an insoluble phenyl-group containing copolymer; R1, R2, R3, R5, and R6 are independently selected from halogen, alkyl, alkylene, phenyl, vinyl, allyl, naphthyl, aralkyl, and Z; and R4 is alkyl, alkylene, phenyl, vinyl, allyl, naphthyl, or aralkyl.
Abstract:
A catalyst of the invention includes a cyclic acylurea compound having a cyclic acylurea skeleton represented by following Formula (I): wherein R is a hydrogen atom or a hydroxyl-protecting group; n is 1 or 2; G is a carbon atom or a nitrogen atom, where two Gs are the same or different when n is 2. The catalyst may include the cyclic acylurea compound and a metallic compound in combination. In the presence of the catalyst, (A) a compound capable of forming a radical is allowed to react with (B) a radical scavenging compound and thereby yields an addition or substitution reaction product of the compound (A) and the compound (B) or a derivative thereof. This catalyst can produce an organic compound with a high selectivity in a high yield as a result of, for example, an addition or substitution reaction under mild conditions.
Abstract:
A catalyst of the invention includes an imide compound having a N-substituted cyclic imide skeleton represented by following Formula (I): wherein R is a hydroxyl-protecting group. Preferred R is a hydrolyzable protecting group. R may be a group obtained from an acid by eliminating an OH group therefrom. Such acids include, for example, carboxylic acids, sulfonic acids, carbonic acid, carbamic acid, sulfuric acid, nitric acid, phosphoric acids and boric acids. The catalyst may include the imide compound and a metallic compound in combination. In the presence of the catalyst, (A) a compound capable of forming a radical is allowed to react with (B) a radical scavenging compound and thereby yields an addition or substitution reaction product of the compound (A) and the compound (B) or a derivative thereof. This catalyst can produce an organic compound with a high selectivity in a high yield as a result of, for example, an addition or substitution reaction under mild conditions.
Abstract:
A catalyst composite includes an agglomerate of a plurality of catalyst composite components and a binder. The catalyst composites may be useful as a catalyst in a variety of chemical processes including hydrogenation, dehydrogenation, hydrogenolysis, oxidation, reduction, alkylation, dealkylation, carbonylation, decarbonylation, coupling, isomerization, amination, deamination, or hydrodehalogenation.
Abstract:
The present invention relates to a new catalyst system for fluorous biphasic catalysis processes which comprises functionalized polymeric beads, monodisperse SiO2 or SiO2 flakes associated with the catalyst. These functionalized particles are used as a support for catalysts in fluorous biphasic catalysis (FBC).
Abstract:
The present invention relates to a new catalyst system for fluorous biphasic catalysis processes which comprises functionalized polymeric beads, monodisperse SiO2 or SiO2 flakes associated with the catalyst. These functionalized particles are used as a support for catalysts in fluorous biphasic catalysis (FBC).
Abstract:
Process for the coupling of a) nucleophiles selected from the group alcohols, thioles, amines, metallised hydrocarbons, CH-acidic compounds and metal cyanides, or of b) carbon monoxide mixed with water, alcohols, ammonia, primary or secondary amines, to organic compounds selected from the group of leaving-group-containing aromatics, hetero-aromatics with a C-bonded leaving group, aromatic or hetero-aromatic methyl compounds with a leaving group bonded to the methyl group, ethylenically unsaturated organic compounds with a C-bonded leaving group, or organic allyl compounds with a leaving group in allyl position, or c) vinyl compounds with leaving-group-containing aromatics, whilst cleaving the leaving group in the presence of Pd complexes with monophospholine ligands as the catalyst, whereby variants b) and c) are carried out in the presence of an inorganic base or organic nitrogen base, the process being characterised in that the Pd complex contains secondary monophosphines with aliphatic, branched or cyclic substituents as ligands.