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8853393 Intermediate for preparing tapentadol or analogues thereof  
The invention discloses a novel intermediate for preparing tapentadol and analogues thereof, wherein the structural formula is shown as formula I or II, and the groups are defined as the...
8198379 Halobutyl elastomers  
The present invention relates to the modification of butyl elastomers, particularly halobutyl elastomers, under solvent free conditions with a phase transfer catalyst in the presence of an alkyl...
6191300 Process for the preparation of cyclopropylacetonitrile  
Disclosed is a process for the preparation and recovery of cyclopropylacetonitrile by a novel combination of process steps beginning with a mixture of cyclopropylmethyl halide, a cyclobutyl halide...
5675029 Cyclic process for activation, use and recovery of phase-transfer catalysts  
A process of making certain compounds using a phase transfer catalyst that permits the recovery and recycle of the phase transfer catalyst.
5099054 Organoclay triphase catalysts  
In a method of carrying out organic conversions via heterogeneous phase transfer catalysis by contacting immiscible liquid phases containing respective substances capable of interacting, with a...
4994597 Method for preparing optically active 3,4-dihydroxy butyric acid derivatives  
The present invention presents a method for preparation of S-3,4-dihydroxy butyronitrile expressed by the structural formula (II) ##STR1## characterized by causing R-3-chloro-1,2-propanediol...
4792606 Process for the preparation of dimeric aromatic acyl cyanides  
A process for the preparation of a dimeric aromatic acyl cyanide of the formula ##STR1## in which Ar is optionally substituted phenyl, naphthyl or hetaryl,comprising reaction an acyl halide of the...
4697035 Process for the preparation of basically substituted phenylacetonitriles  
A simplified process for the preparation of basically substituted phenylacetonitriles, in particular of verapamil, is described. This process is carried out with fewer stages and higher yields...
4661610 Preparation of veratryl cyanide  
Veratryl cyanide is prepared by chloromethylating veratrol in solution in toluene and then reacting the resulting veratryl chloride with from 1 to 5 moles of an alkali metal cyanide, by a process...
4478753 Process for the production of 11,11,12,12-tetracyano-9,10-anthraquinodimehane _or its derivatives  
A process for producing 11,11,12,12-tetracyano-9,10-anthraquinodimethane or its derivatives of the general formula ##STR1## in which Z1, Z4, Z5, and Z8 independently represent hydrogen, chlorine,...
4362884 Silacrown ethers, method of making same, and use as phase-transfer catalysts  
Organosilicon compounds referred to as silacrown ethers or "silacrowns" are of the general formula: ##STR1## where R1 and R2 are organic radicals or hydrogen and n is an integer between 4 and 10...
4360478 Preparation of α-cyanobenzyl esters  
New α-halobenzyl esters, intermediates for α-cyanobenzyl pyrethroid esters, are prepared by treating a benzaldehyde derivative with a pyrethroid acid halide. The resulting α-halobenzyl ester is...
4322369 Preparation of alkyl cyanoacetates  
The alkyl cyanoacetates are prepared by reacting an alkyl chloracetate with an excess of an alkali metal cyanide, in an inert solvent and in the presence of at least one tertiary amine...
4229366 Process for heterogeneous nucleophilic substitution reactions  
The invention relates to a process for nucleophilic substitution reactions. According to the invention the reaction is carried out in a heterogeneous system, consisting of a solid and a dissolved...
4144265 Process for the manufacture of m-trifluoromethyl benzyl nitrile  
Quaternary ammonium salts, such as methyl tributyl ammonium chloride, are novel catalysts in a nitrile-forming reaction which comprises stirring together aqueous sodium cyanide and the undistilled...
4138429 Process for the manufacture of o-phenylenediacetonitrile  
A process for the manufacture of o-phenylenediacetonitrile by reacting an aqueous solution of an alkali metal or alkaline earth metal cyanide with an o-xylylene halide optionally in the presence...
4069340 Immonium salts and derivatives thereof  
There are provided: novel aryloxy immonium salts, prepared by the reaction of their corresponding haloformates with amides; and phenolic compositions corresponding to the aryloxy immonium salts....
4056509 Preparation of benzyl cyanides  
Optionally ring-substituted benzyl cyanides are prepared by reacting the corresponding benzyl halide with an aqueous phase containing cyanide ions in the presence of a liquid organic phase...
4022816 Purification of chlorobutyronitrile  
Chloro alkyl nitriles containing from about 3 to about 7 carbon atoms, such as chlorobutyronitrile, are produced in high purity by reacting the corresponding bromochloro alkane, typically...
4001293 Process for production of γ-halonitriles  
A new process for preparing γ-halonitriles comprising reacting by contacting a 1,3-dihalopropane, such as 1-chloro-3-bromopropane, or mixtures thereof, such as 1-chloro-3-bromopropane and...
3992432 Phase transfer catalysis of heterogeneous reactions by quaternary salts  
A process for catalyzing heterogeneous ionic organic reactions in a system of multiple liquid phases in which at least two of the reactants are each located in a different phase with respect to...
3941827 Preparation of halogenated nitriles  
A process is disclosed for preparing halogenated hydrocarbyl nitriles comprising reacting a metal or ammonium cyanide with a dihalogenated aliphatic or alicyclic hydrocarbon of the formula...
3917665 Preparation of phenylene diacetonitrile  
Novel polyamides are prepared by reacting a dicarboxylic acid with 1,4-cyclohexane-bis(β-ethylamine). Unique properties are obtained where the dicarboxylic acid is 1,4-cyclohexane diacetic acid.
3839399 PRODUCTION OF ORGANIC CYANIDES  
3773808 METHOD OF PREPARING CYANOACETIC ACID ESTERS  
1,222,638. Cyanoacetic esters. PHILIPS' GLOEILAMPENFABRIEKEN N.V. 23 Oct., 1969 [26 Oct., 1968], No. 51928/69. Heading C2C. Cyanoacetic esters NC.CH 2 .COOR, where R is alkyl, alkenyl, cycloalkyl,...
3725458 PROCESS FOR PREPARING CYANO-COMPOUNDS  
A process for the preparation of terminally substituted cyano-compounds from 1-alkenes. The process involves the preparation of a 1-bromoalkane from the reaction of the 1-alkene and HBr in the...
3498999 1-PHENOXY AND SUBSTITUTED PHENOXY-3-(5-TETRAZOLYL) PROPANES  
3427322 PREPARATION OF CYANOETHERS  
3384654 Process for the manufacture of cyanoacetic acid esters  
Cyanoacetic acid esters of the general formula CN-CH2-COOR, in which R represents an optionally substituted aliphatic, cycloaliphatic or aralkyl radical, are prepared by reacting at least the...
3133114 Preparation of nitriles  
3026347 Improved process for the nitrilation of 6-halohexanoic acid esters  
3026346 Improved process for the nitrilation of 6-halohexanoic acid esters  
2878277 Production of adiponitrile  
2841535 Purification of dimethyl formamide  
2786072 Production of adiponitrile  
2783268 Production of adiponitrile  
2783265 Preparation of phenylacetonitriles  
2779781 Cyanidation catalysts  
2715137 Production of nitriles  
2715138 Production of adiponitrile  
2399349 Production of fumarodinitrile  
The present invention relates to an improved method for the production of fumarodinitrile by the reaction of di-iodoethylene with cuprous cyanide. The preparation of fumarodinitrile by reaction of...

Matches 1 - 41 out of 41