Class 568/68 - Preparing by utilizing halogen, heavy metal, or aluminum containing material

Subclass of Class 568 - Organic compounds -- part of the class 532-570 series
Definition: Processes wherein the compound is prepared by utilizing
No. of patents: 31
Last issue date: 09/26/2006

Number	Title	Issue Date
7112697	Methods for formation of aryl-sulfur and aryl-selenium compounds using copper(I) catalysts A mild, palladium-free synthetic protocol for the cross-coupling reaction of vinyl or aryl iodides and thiols or selenols using, in certain embodiments, 10 mol % CuI and 10 mol % neocuproine, with NaOt-Bu as the base, in toluene at 110 ° C. A variety of vinyl/aryl ...	09/26/2006
6974877	Process for preparing pentacene derivatives A process for preparing substituted pentacene compounds comprises the step of cyclizing substituted bis(benzyl)phthalic acids using an acid composition comprising trifluoromethanesulfonic acid, the substituted bis(benzyl)phthalic acids being represented by the follo...	12/13/2005
6667421	Hydrogen reduction of sulfonyl chlorides to thiols This invention relates to a process for the production of an aryl thiol, which comprises hydrogenating an aryl sulfonyl chloride in a solvent in the presence of a palladium catalyst and a base whose conjugate acid has a pKa of about 2 or greate...	12/23/2003
6054623	Hydroxythiol grignard reaction synthesis A method for the preparation of hydroxythiol compounds by reacting a hydroxyl-protected halide compound having the structure: X--R--OPg with magnesium in a Grignard-suitable solvent to form a hydroxyl-protected magnesium halide compound, wherein R is selected ...	04/25/2000
5780402	Alkylated thiophenol lubricants Novel alkylated thiophenols are high temperature stable lubricant fluids having low temperature properties and excellent load-carrying properties and additive solubility....	07/14/1998
5728887	Catalytic hydrogenolysis of organic thiocyanates and disulfides to thiols A process for the preparation of a thiol comprising reacting hydrogen with a thiocyanate or disulfide wherein the reaction with thiocyanate is conducted in the presence of a catalyst comprising a Group VIII metal or a mixture thereof; and the reaction wit...	03/17/1998
5338886	Process for preparation of aromatic thiols Disclosed is a process for preparation of an aromatic thiol corresponding to the structure A-(SH)n wherein A is a substituted or unsubstituted aromatic radical and n is 1, 2, 3, 4, 5 or 6 comprising contacting at a temperature of at least 80° C. an aroma...	08/16/1994
5266705	Process for production of 2-acetylbenzo[b]thiophene A process for production of 2-acetylbenzo[b]thiophene represented by the formula (I): ##STR1## comprising the steps of: (1) reacting 2-halogenobenzaldehyde represented by the formula (II): ##STR2## wherein X represents a halogen atom, with...	11/30/1993
5171915	Alkylaromatic lubricants from alpha-olefin dimer It is disclosed that aromatic compounds can be alkylated with mono-olefinic HVI-PAO dimer in contact with an acidic catalyst to produce novel alkylated aromatic compositions. It has been found that the novel HVI-PAO dimer alkylated aromatic compositions e...	12/15/1992
5136114	Process for the preparation of geminal diarylalkanes, new geminal diarylalkanes and alk(en)ylated aromatic compounds The invention relates to a new process for the preparation of geminal diarylalkanes of the formula ##STR1## by Friedel-Crafts alkylation of aromatic compounds with specific aliphatic halogen compounds (addition compounds of CCl4 , to ...	08/04/1992
5032380	Detection of sulfur mustards using spectrofluorometry Fluorescence properties of the product of the reaction of the 2-naphthalenethiolate ion and 2-chloroethylethylsulfide or bis(2-chloroethyl)sulfide are described. The fluorescence of the latter reaction is used as the basis of a new detection method for ...	07/16/1991
5004841	Alkylation of aromatic compounds to alkylates enriched in the linear-substituted isomers Aromatic compounds, such as benzene or biphenyl, are alkylated with an alkylating agent having from one to eight carbons atoms, such as propylene, in the presence of an acidic mordenite zeolite catalyst under conditions sufficient to produce a mixture of ...	04/02/1991
4978796	N-alkylpyrrolidone solvents for preparation of aromatic thiols A process using N-alkylpyrrolidone solvents, such as N-methylpyrrolidone (NMP), for the preparation of aromatic thiols, from the reaction of aryl halides and alkali metal alkanethiolate. This process produces aromatic thiols in higher yields and purity....	12/18/1990
4948827	Methyl-2-tertiary butyl-5-thiophenol, its preparation process and its use This new thiophenol, prepared by reduction of tertiary butyl-4-toluenesulfonyl-2-chloride with the zinc-sulphuric acid couple, can be used as a stabilizer for vinyl chloride polymers, as a chain-transfer agent and as a peptizer....	08/14/1990
4891448	Alkylation of polycyclic aromatic compounds to alkylates enriched in the para-substituted isomers Polycyclic aromatic compounds, such as biphenyl, are alkylated with an alkylating agent, such as propylene, in the presence of an acidic mordenite zeolite catalyst under conditions sufficient to produce a mixture of substituted polycyclic aromatic compoun...	01/02/1990
4794205	Method for producing alkenylthiophenols and their esters A method is provided for preparing alkenylthiophenols, e.g., para-vinylthiophenol, or their esters, e.g., para-vinylthiophenol acetate by reacting a hydroxy aromatic ketone, e.g., 4-hydroxyacetophenone (4-HAP) with an N,N-di(organo)thiocarbamoyl halide, e...	12/27/1988
4767884	Reduction of sulfonic acid to thiol A sulfonic acid is reduced to a thiol by heating the acid under carbon monoxide pressure in the presence of a rhodium carbonyl catalyst....	08/30/1988
4754072	Preparation of thiophenols from phenols Thiophenols are formed from phenols by first reacting a phenol with thiophosgene to form an aryl chlorothionoformate which is subjected to a halogen exchange reaction using an alkali metal fluoride to yield the corresponding fluorothionoformate. This fluo...	06/28/1988
4740623	Method for preparation of benzyl mercaptan A method for the preparation of benzyl mercaptan is disclosed which comprises reacting a benzyl halide of the formula ##STR1## wherein X is chlorine or bromine, with an alkali metal hydrosulfide salt, at a temperature and for a sufficient period of t...	04/26/1988
4542233	Process for preparing biaryl compounds via coupling of an arylamine with an arene Improvement in the process for preparing biaryl compounds via coupling of an arylamine with an arene in the presence of a nitrite, an acid and copper metal or a derivative thereof; the improvement is consisting in adding to the reaction mixture a trialkyl...	09/17/1985
4209469	Process for the production of aryl thiols A process for the production of an aryl thiol, which comprises hydrogenating an aryl sulfochloride in a protic or aprotic solvent in the presence of platinum as catalyst, at a temperature between 100° and 180° C., with hydrogen under a pressure of 2 to ...	06/24/1980
4128586	Catalytic reduction of aromatic sulfonyl halides with hydrogen sulfide to yield aromatic thiols A process for reducing aromatic sulfonyl halides with hydrogen sulfide. Hydrogen sulfide is contacted with sulfonyl halides preferably in the presence of a solvent and of a catalyst. The reaction forms thiols and proceeds in the range of between about 50�...	12/05/1978
4088698	Production of thiophenols A method for preparing thiophenolic compounds is described comprising reacting a phenol and hydrogen sulfide in the presence of a vanadia catalyst. It is preferred to carry out the process of this invention at low pressures, i.e. at pressures lower than 1...	05/09/1978
4066686	New benzhydrysulphinyl derivatives The invention provides the benzhydrylsulphinyl derivatives of the formula: where n is 1, 2 or 3 and R is C(.dbd.O)NHOH, C(.dbd.NH)NH2, C(.dbd.NH)NHOH, 2-Ɗ2 -imidazolinyl or NR1 R2 (where R1 is H or C...	01/03/1978
4059636	Mercaptans by catalytic cleavage of organic sulfides A method is provided for preparing mercaptans by catalytic cleavage of organic sulfides with hydrogen sulfide in the presence of a supported phosphotungstic acid catalyst. The process is particularly advantageous with n-alkyl sulfide feedstock and being h...	11/22/1977
4024191	Fractional distillation process In the fractional distillation of multicomponent mixtures where freezing of a component is encountered in the overhead condensing section and/or product decomposition is encountered at reboiling temperatures, these problems are obviated by carrying out th...	05/17/1977
4022582	Corrosion-resistant reactor suitable for high temperature/high pressure operation A corrosion-resistant reactor suitable for high temperature/high pressure operation consisting essentially of ceramic-lined reaction and quench chambers....	05/10/1977
4005149	Mercaptans by hydrogen sulfide-cleavage of organic sulfides in presence of carbon disulfide In a process for preparing mercaptans by catalytic cleavage of organic sulfides with hydrogen sulfide in the presence of sulfactive catalysts a method is provided for increasing the total conversion of reactants to mercaptans by including carbon disulfide...	01/25/1977
4000198	Hydroxy-acetylene-substituted cyclohexenone A total synthesis of canthaxanthin or dinor-canthaxanthin, known food coloring agents, from pentols....	12/28/1976
3994980	Cobalt molybdate as catalyst for preparation of mercaptans from carbonyl compounds hydrogen sulfide and hydrogen Mercaptans are prepared by reacting an organic carbonyl compound with sulfur or hydrogen sulfide in the presence of a catalyst consisting essentially of cobalt, molybdenum and an inorganic oxide support material....	11/30/1976
3963785	Mercaptans by addition of hydrogen sulfide to olefins in presence of carbon disulfide In a method for preparing mercaptans by the addition of hydrogen sulfide to olefins in the presence of sulfactive catalysts a method is provided for increasing the total conversion of reactants to mercaptans by including carbon disulfide in the reaction m...	06/15/1976

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Class 568/68 - Preparing by utilizing halogen, heavy metal, or aluminum containing material