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Copper chloride with amines

NHC (IMS HCl) as the ligand or even under ligand-free conditions. Copper salts were applied in these transformations as well. In 2003, a nickel-catalyzed system was also developed. With Ni(0) generated in situ as the catalyst and 2,2 -hipyridine or N,A/ -his(2,6-diisopropylphenyl)dihy-droimidazol-2-ylidene (SIPr) as the ligand, the intramolecular coupling of aiyl chlorides with amines was achieved with NaOfBu as the base. Indoles, quinolines, benzazepines, benzoxazines, and benzoxazepines were produced in good yields from the corresponding substrates. [Pg.157]

The very unusual organometallic liquid crystals, 15, [M, M =Pd, Pt or Ni M=M or M9tM ] were made by Takahashi et al. in 1978 [25], by a copper chloride-triethyl-amine coupling of the appropriate metal halide with an alkyne. These materials do not show thermotropic properties, however they are lyotropie nematic in trichloroethylene solution. [Pg.1918]

Aromatic amines form addition compounds and complexes with many inorganic substances, such as ziac chloride, copper chloride, uranium tetrachloride, or boron trifluoride. Various metals react with the amino group to form metal anilides and hydrochloric, sulfuric, or phosphoric acid salts of aniline are important intermediates in the dye industry. [Pg.229]

For the in situ preparation of the required arenediazonium salt from an aryl amine by application of the diazotization reaction, an acid HX is used, that corresponds to the halo substituent X to be introduced onto the aromatic ring. Otherwise—e.g. when using HCl/CuBr—a mixture of aryl chloride and aryl bromide will be obtained. The copper-(l) salt 2 (chloride or bromide) is usually prepared by dissolving the appropriate sodium halide in an aqueous solution of copper-(ll) sulfate and then adding sodium hydrogensulfite to reduce copper-(ll) to copper-(1). Copper-(l) cyanide CuCN can be obtained by treatment of copper-(l) chloride with sodium cyanide. [Pg.248]

Suitable catalysts are copper(I) salts [e.g., Cu(I) chloride, bromide, and sulfate] in combination with amines to form oxidation sensitive phenolates. The amine/copper salt ratio must be made as large as possible, to minimize the formation of diphenylquinone and to give a high molecular weight. [Pg.307]

There have also been several reports of the cyclization of diynes with amines under the influence of copper(I) chloride (equation 73) (65CB98, 70KGS125, 72TL3487). This is a potentially useful reaction for symmetrically substituted pyrroles, since symmetrical diynes can be obtained by oxidative coupling of alkynes. [Pg.331]

When either an alcohol or an amine function is present in the alkene, the possibility for lactone or lactam formation exists. Cobalt or rhodium catalysts convert 2,2-dimethyl-3-buten-l-ol to 2,3,3-trimethyl- y-butyrolactone, with minor amounts of the 8-lactone being formed (equation 51).2 In this case, isomerization of the double bond is not possible. The reaction of allyl alcohols catalyzed by cobalt or rhodium is carried out under reaction conditions that are severe, so isomerization to propanal occurs rapidly. Running the reaction in acetonitrile provides a 60% yield of lactone, while a rhodium carbonyl catalyst in the presence of an amine gives butane-1,4-diol in 60-70% (equation 52).8 A mild method of converting allyl and homoallyl alcohols to lactones utilizes the palladium chloride/copper chloride catalyst system (Table 6).79,82 83... [Pg.941]

Copper Complexes. The preparation of copper and nickel complexes of tridentate metallizable azo and azomethine dyes is easily carried out in aqueous media with copper and nickel salts at pH 4-7 in the presence of buffering agents such as sodium acetate or amines. Sparingly water soluble precursors can be metallized in alkaline medium at up to pH 10 by using an alkali-soluble copper tetram(m)ine solution as coppering reagent, which is available by treating copper sulfate or chloride with an excess of ammonia or alkanolamines [3],... [Pg.86]

The structure of the parent material in this study—due to its uniqueness with respect to its inequivalent chloride ions both as coordinated and lattice chlorides—represents yet still another example of a solid state copper imidazole material. Others include copper(II) perchlorate salts complexed with amines [10] and copper(I) imidazole complexes based on a cavitand ligand design [11], Copper(I) imidazole complexes have been... [Pg.36]

Compounds with a terminal acetylenic function, RCsCH, react with 1-bromoalkynes, R CsCBr in the presence of an aliphatic amine and a catalytic amount of a copper salt to give the coupling products RCsCCsCR. This useful reaction, discovered by Cadiot and Chodkiewicz [195], gives a ready access to a number of poly-unsaturated systems. The usual procedure involves dropwise addition of the bromoacetylene R GsCBr to a mixture of the acetylene RCsCH, ethylamine, ethanol or methanol, a catalytic amount of copper chloride or bromide and a small amount of hydroxylamine.HCl. This reducing agent prevents the oxidation to copper ). The reaction is usually very fast at temperatures in the region of 30 C. Since much heat is evolved, the reaction can be monitored easily by temperature observation. [Pg.112]

The interesting research of Votocek, Zenisek 4 and Sebor 5 may also be referred to in this connection. This permits the Sandmeyer-Gattermann reaction (substitution of the diazo-group by chlorine and bromine) to be carried out electrolytically. For this purpose the diazotized solution of the amine is electrolyzed —for instance 50 g. aniline, 120 g. HC1, 38.5 g. NaN02—between copper electrodes with addition of cuprous chloride or copper sulphate. At the end of the experiment (ceasing of the nitrogen... [Pg.196]

Cu(l) and Fe(ll) complexes prepared in situ by reacting copper(l) or iron(ll) chloride with 1 equiv of ligand LI (tris(pyridin-2-ylmethyl)amine) or L2 are efficient catalysts for atom-transfer radical addition reactions. For instance, pent-4-enyl trichloroacetate was converted into 3,3,5-trichlorooxocan-2-one in 90% and 99% yield, respectively, when CuCl-Ll and CuCl-L2 were used as catalysts (Scheme 30) <2000J(P1)575>. [Pg.73]

The reaction of zinc-copper reagents with acid chlorides has a remarkable generality [7,19] and has found many applications in synthesis (Scheme 9-30) [16,59-64]. The treatment of silyl-protected o-aminated benzylic zinc-copper derivatives such as 33 with an acid chloride leads to a 2-substituted indole 34. Aromatic and heterocyclic zinc compounds provide polyfunctional aromatic or heterocyclic ketones like 35 (see Section 9.6.8 Scheme 9-31) [60]. [Pg.211]

In combination with the incremental advances concerning reaction conditions in recent years, especially for low-pressure carbonylations, there is a trend toward increasing use of this chemistry to synthesize advanced building blocks. In this respect carboxylation of alkenes with an appropriate alcohol or amine function leads to the formation of lactones or lactams. Thus, cobalt, rhodium, or palladium chloride/copper chloride catalysts convert allyl and homoallyl alcohols or amines to the corresponding butyrolactones or butyrolactams, respectively [15]. [Pg.185]

The reactions of triphenylbismuthane with amines are carried out in the presence of stoichiometric amounts of copper diacetate in methylene chloride for 18-24 h to give... [Pg.516]

Some other metal salts and other reagents which have been used to oxidize tertiary amines to enamines include palladiumfll) chloride copper(II) chloride , copperfi) chloride with oxygen , iodine, iodine pentafluoride , chlorine dioxide S permanganate ion , manganese dioxide , AT-bromosuccinimide , benzoyl peroxide , quinones and azodiformate . ... [Pg.486]

Although it is possible to prepare aryl chlorides and aryl bromides by electrophilic aromatic substitution, it is often necessary to prepare these compounds from an aromatic amine. The amine is converted to the corresponding diazonium salt and then treated with copper chloride or copper(I) bromide as appropriate. [Pg.893]


See other pages where Copper chloride with amines is mentioned: [Pg.39]    [Pg.327]    [Pg.139]    [Pg.49]    [Pg.205]    [Pg.568]    [Pg.576]    [Pg.166]    [Pg.1483]    [Pg.46]    [Pg.363]    [Pg.862]    [Pg.486]    [Pg.73]    [Pg.28]    [Pg.339]    [Pg.127]    [Pg.862]    [Pg.327]    [Pg.394]    [Pg.426]    [Pg.506]    [Pg.212]    [Pg.245]    [Pg.252]    [Pg.252]    [Pg.253]    [Pg.567]    [Pg.568]    [Pg.665]   
See also in sourсe #XX -- [ Pg.1172 ]




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Copper amine

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