Abstract: The invention relates to a process for substituting for a halogen atom attached to the nuclear carbon atom of an aromatic ring, a substituent of the formula -O-R wherein R represents alkyl, alkenyl, alkynyl or benzyl, which process comprises reacting the halogen-substituted aromatic compound with an alcoholate of the formula M.sup.n+ [O--R].sub.n.sup..crclbar. wherein M is an alkali metal atom or alkaline earth metal atom, n is the valency of M, and R is as defined above, in the presence of an active catalyst mixture comprising (i) a formic acid ester of an organic alcohol having the formula R.sup.2 --O--CO--H wherein R.sup.2 is as defined for R above; and (ii) a cuprous salt; in a liquid medium which is a solvent for the catalyst mixture and in which the halogen-substituted aromatic compound is at least partially soluble, under substantially anhydrous conditions and a non-oxidizing atmosphere. The invention further relates to a catalyst used in the above process.
Abstract: A process for isomerizing styrene or homologues to .beta.-phenylaldehydes, consisting of conducting the isomerization reaction in the presence of a catalyst constituted by synthetic zeolites containing titanium, of formulaxTiO.sub.2.(1-x)SiO.sub.2where x lies between 0.0001 and 0.04, and optionally in the presence of one or more solvents, operating at a temperature of between 30.degree. and 100.degree. C.
Abstract: This invention provides for certain novel terphenyl derivatives, their pharmaceutical formulations, and a method of treating pain, fever, thrombosis, inflammation, and arthritis.
Abstract: New compounds and a method for inhibiting the growth of fungus is disclosed which comprises contacting said fungus with a fungicidal amount of a phenyl glycine compound of the formula: ##STR1## wherein R.sub.1 and R.sub.2 are independently hydrogen, lower alkyl, substituted lower alkyl, cycloalkyl, substituted cycloalkyl, alkenyl, phenyl, substituted phenyl, halogen, amino or hydroxy groups; R.sub.3 is a hydrogen, lower alkyl, substituted lower alkyl, cycloalkyl, benzoyl, halo or nitro substituted benzoyl, substituted cycloalkyl, methylcarbamoyl, cyclohexylcarbamoyl, phenylcarbamoyl, halophenylcarbamoyl, methylphenylcarbamoyl, methylthiocarbamoyl, phenyl, substituted phenyl, napthyl group or --SO.sub.2 R.sub.7 where R.sub.7 is a hydrogen, alkyl, substituted alkyl, phenyl, substituted phenyl or amino group; R.sub.4 and R.sub.5 are independently hydrogen, lower alkyl or substituted lower alkyl groups and R.sub.6 is a hydrogen, lower alkyl or substituted lower alkyl, alkenyl or substituted alkenyl group.
Abstract: Amidino compounds represented by the formula (I) ##STR1## and pharmaceutically acceptable acid addition salts thereof are novel compounds and are useful as powerful antitrypsine, antiplasmin, antikallikrein and anti-thrombin agents. Having strong anti-Cl (Clr, Cls) activities and an anticomplement activity, they are also useful as anticomplement agents. These amidino compounds are prepared by usual esterification of carboxylic acid compounds represented by the formula (II)R.sub.1 --COOH (II)with 4-(.beta.-amidinoethenyl)phenol represented by the formula (III) ##STR2## and, if necessary, can be transformed into pharmaceutically acceptable acid addition salts thereof.
Abstract: A process for producing urethanes by reacting aromatic amino compounds with aliphatic, cycloaliphatic or araliphatic alcohols and carbon monoxide under conditions of elevated temperature and pressure characterized in that the reaction takes place in the presence of(a) selenium, selenium compounds, sulfur and/or sulfur compounds,(b) aromatic nitro compounds,(c) tertiary organic amines and/or alkali metal salts of weak acids,(d) oxidizing agents of a specified group and, optionally(e) ammonia and/or aliphatic, araliphatic, cycloaliphatic or heterocyclic amines containing at least one hydrogen atom bound to an amine nitrogen.
Abstract: A very pure, dust-free commercial form of 4,2',4'-trichloro-2-hydroxydiphenyl ether with little odor is prepared by diazotizing 4,2'4'-trichloro-2-aminodiphenyl ether, boiling the diazonium salt and purifying the reaction product.
Abstract: Arenes are reacted with allyl chloride to produce allylarenes and 2-chloropropyl- or propenylarenes using a catalyst comprising a metal oxide substrate having tantalum (V) halide/oxide bound to the surface of the substrate.
Abstract: Phenols, including the polyhydric phenols, are selectively monoetherified with an alkyl or alkenyl carboxylate, or admixture of compounds adapted to in situ form such carboxylate, in the presence of a salt of a carboxylic acid.
Abstract: Process for the preparation of esters of carbamic acids by carbonylation of aromatic nitrocompounds, with carbon monoxide, in the presence of alcohols and of catalyst consisting of metallic selenides.
Abstract: This specification discloses a process for the production of oxygenated compounds, more specifically aldehydes and alcohols, by reacting an olefin with hydrogen and carbon monoxide in the presence of, as a ctalyst, an insoluble polymer containing a functional group, which may be an amine, thiol, phosphine, or arsine group, having chemically bonded thereto a metal of Group VIII of the Periodic Table. The metal can be, for example, rhodium, cobalt, or ruthenium. The olefin can contain more than one carbon-to-carbon double bond, may be an open chain or a cyclic olefin, and may be substituted. Further, the olefin may be contained in a refinery stream such as a cracked gasoline. The reaction may be carried out in the presence of a polar solvent.
Abstract: Phenols are etherified to products such as anisole by contacting said phenols with a low molecular weight alcohol or ether in the presence of an acid catalyst comprising a sulfated composite of one or more transition metal oxides on alumina. The process of this invention may be used to etherify, in situ, phenols present in synthetic fuel feedstocks, such as phenols present in naphthas derived from coal liquefaction. Preferred catalysts comprise oxides of tungsten, hafnium, and mixtures thereof on a high surface area gamma alumina support containing at least 2 wt. % sulfate ions.
Abstract: A process is described for purifying the bacteriostat 2,4,4'-trichloro-2'-hydroxydiphenylether prepared by the diazotization of 2,4,4'-trichloro-2'-aminodiphenylether from the 2,4,8-trichlorodibenzofuran and associated nonphenolics which form. A selective solvent extraction for these non-phenolics consisting of tetrachlorethylene is used after neutralization of the hydrolyzed diazo product.
Abstract: A process for the isolation of a dihydroxybenzene-monoether from a reaction mixture containing solvent, ether and unreacted dihydroxybenzene, comprising contacting the reaction mixture with at least one hydrocarbon which is not miscible or only partially miscible with the reaction mixture, the ether selectively entering the hydrocarbon. Advantageously the reaction for the preparation of the monoether is carried out in an alcohol, a ketone, a dipolar aprotic solvent or a polyhydroxyalkyl ether, or a mixture thereof with water, the hydrocarbon used as extracting agent has a boiling point between about 80.degree. and 300.degree. C., and the extraction is carried out in the presence of water whereby there is an increase in the selectivity of the extraction.
Type:
Grant
Filed:
August 30, 1982
Date of Patent:
December 4, 1984
Assignee:
Bayer Aktiengesellschaft
Inventors:
Manfred Lenthe, Udo Allenbach, Gerhard Buttner, Karl-Friedrich Christmann
Abstract: The invention relates to a process for the production of 3 (alkyl phenyl) propanals; certain of which are known to be valuable in the perfumery industry. The process enables this group of chemicals to be produced more easily as compared to known processes for their production. In a preferred embodiment in one step of the process the alkylation of the 3 phenyl propanol is carried out under controlled conditions so as to favor the production of para isomer of the product.
Abstract: This invention relates to an improvement in the process of isolating certain diphenyl ethers from an aprotic organic solvent by the addition of a diphenyl ether phase forming amount of water to a reaction mixture comprising a liquid phase of the diphenyl ether dissolved in the solvent.
Abstract: Phenylamino-oxo-acetic acids and the esters thereof, of the formula I ##STR1## wherein X.sub.1 and X.sub.2, each independently of the other, are halogen or halomethoxy, or one of X.sub.1 and X.sub.2 is also hydrogen,R.sub.1 is hydrogen or C.sub.1 -C.sub.4 alkyl, andR.sub.2 is hydrogen or an unsubstituted or substituted C.sub.1 -C.sub.18 alkyl, C.sub.3 -C.sub.18 alkenyl, C.sub.3 -C.sub.6 alkynyl or C.sub.3 -C.sub.8 cycloalkyl radical,are able to protect cultivated plants from the phytotoxic action of aggressive herbicides. Preferred herbicides are those of the classes of .alpha.-(phenoxyphenoxy)propionic acid and .alpha.-(pyridyloxyphenoxy)propionic acid derivatives. The cultivated plants to be protected are primarily monocots, i.e. cereals.
Type:
Grant
Filed:
January 31, 1983
Date of Patent:
November 20, 1984
Assignee:
Ciba-Geigy Corporation
Inventors:
Werner Breitenstein, Werner Fory, Robert Nyfeler, Manfred Boger
Abstract: Disclosed is a method for the preparation of 8-methoxy-4,8-dimethyl-1-(4-isopropylphenyl)-nonane which comprises the steps of(a) reacting para-isopropylbenzyl chloride with triphenylphosphine in the presence of a suitable solvent for a sufficient period of time and at a sufficient temperature to form an intermediate product in solution, para-isopropylbenzyl triphenylphosphonium chloride, and(b) reacting said solution with sodium methoxide, followed by methoxycitronellal to produce cis- and trans-8-methoxy-4,8-dimethyl-1-(4-isopropylphenyl)-1-nonene,(c) separating said intermediate product from the residual reactants, and(d) hydrogenating said cis- and trans-8-methoxy-4,8-1-(4-isopropylphenyl)-1-nonene, in the presence of a suitable solvent and catalyst to form 8-methoxy-4,8-dimethyl-1-(4-isopropylphenyl)-nonane.
Abstract: The homogeneous catalysis of the hydrocarbonylation of olefins using a catalyst comprising a complex between an organic ligand and a Group VIII noble metal hydride carbonyl. The reaction is performed at mild conditions including temperatures from 50.degree.-200.degree. C. and pressures from 1 to 10,000 atmospheres to produce a predominantly aldehyde product having a high normal to iso distribution. The aldehyde products so produced are useful as intermediates for hydrogenation to aliphatic alcohols, for aldol condensation to produce plasticizers, for oxidation to produce aliphatic acids, etc.