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Upstream product

• 109-99-9 tetrahydrofuran 
• 95-68-1 2,4-Xylidine 
• 110-63-4 Butane-1,4-diol 
• 123-75-1 pyrrolidine 
• 583-70-0 1-bromo-2,4-dimethylbenzene 
• 87241-52-9 2,4-dimethylphenyl trifluoromethanesulfonate 
• 4214-28-2 1-iodo-2,4-dimethylbenzene 
• 110-52-1 1,4-dibromo-butane 

Relevant academic research and scientific papers

Cycloaddition of Enamine and Iminium Ion Intermediates Formed in the Reaction of N -Arylpyrrolidines with T-HYDRO

The reaction of N-arylpyrrolidine derivatives with 70% aqueous tert-butyl hydroperoxide (T-HYDRO) in the presence of NaOAc·3H2O gives tetracyclic amines in 59-78% yields via cycloaddition of the corresponding iminium ion and enamine intermediates formed in situ in cyclohexane solvent. The iminium ion intermediate reacts with t-BuOK in methanol to give the corresponding cyclic amides in 85-88% yields or undergoes alkylation to give the corresponding nitromethyl product in 74-79% yields using t-BuOK and nitromethane in methanol.

METHOD FOR PRODUCING N-SUBSTITUTED AMINE COMPOUNDS THROUGH CATALYZED ALKYLATION

The invention relates to a method for producing a N-substituted amine compound by catalyzed alkylation. The method uses amine and alcohol or two kinds of amines as the reaction materials, employs composite metal oxides catalyst at a reaction temperature of 80-180° C. to catalyze the reaction for 6-36 hours, so as to produce the N-substituted amine compound. The reaction condition of the method of the invention is relatively moderate, using a catalyst made of cheap non-noble metals, which is non-caustic and easy to be separated and reused. The reaction does not need any medium and has relatively high conversion rate and selectivity.

Development of a general non-noble metal catalyst for the benign amination of alcohols with amines and ammonia

The N-alkylation of amines or ammonia with alcohols is a valuable route for the synthesis of N-alkyl amines. However, as a potentially clean and economic choice for N-alkyl amine synthesis, non-noble metal catalysts with high activity and good selectivity are rarely reported. Normally, they are severely limited due to low activity and poor generality. Herein, a simple NiCuFeOx catalyst was designed and prepared for the N-alkylation of ammonia or amines with alcohol or primary amines. N-alkyl amines with various structures were successfully synthesized in moderate to excellent yields in the absence of organic ligands and bases. Typically, primary amines could be efficiently transformed into secondary amines and N-heterocyclic compounds, and secondary amines could be N-alkylated to synthesize tertiary amines. Note that primary and secondary amines could be produced through a one-pot reaction of ammonia and alcohols. In addition to excellent catalytic performance, the catalyst itself possesses outstanding superiority, that is, it is air and moisture stable. Moreover, the magnetic property of this catalyst makes it easily separable from the reaction mixture and it could be recovered and reused for several runs without obvious deactivation. Copyright

N-heterocyclization of primary amines with dihalides using microreactors

(Chemical Equation Presented) A practical, rapid, and efficient reaction using microreactors for the direct N-alkylation from aniline derivatives and alkyl dihalides has been achieved in the presence of aqueous potassium carbonate at an elevated temperature. This improved synthetic methodology provides a straightforward microfluid approach to the synthesis of a variety of N-aryl azacycloalkanes. Copyright Taylor & Francis Group, LLC.

Cadmium(II)-catalyzed C-N cross-coupling of amines with aryl iodides

Cadmium diacetate dihydrate [Cd(OAc)2·2H2O] in combination with ethylene glycol catalyzes efficiently the C-N cross-coupling of amines with aryl iodides by a benzyne mechanism. Alkyl, aryl and heterocyclic amines are compatible with this system affording the aminated products in high to excellent yield.

An improved method for the palladium-catalyzed amination of aryl triflates

Aryl triflates are coupled with amines using catalytic amounts of Pd(OAc)2 and BINAP and Cs2CO3 as a stoichiometric base. This protocol allows for the efficient amination of electron-poor as well as electron-rich aryl triflates and the reaction conditions are compatible with a wide variety of functional groups.

Improved functional group C compatibility in the palladium-catalyzed amination of aryl bromides

Aryl bromides are coupled with amines in the presence of a palladium catalyst and a stoichiometric amount of cesium carbonate. Using these conditions base-sensitive functional groups, which were incompatible with our previously reported catalytic-amination reaction conditions, are well tolerated.

SYNTHESIS OF STERICALLY HINDERED 1-ARYLPYRROLIDINES AND 1-ARYLPIPERIDINES BY CONDENSATION OF PRIMARY AROMATIC AMINES WITH CYCLIC ETHERS OR DIOLS

A variety of 1-(o-alkylphenyl)- and 1-(o-o'-dialkylphenyl)-pyrrolidines and -piperidines were prepared by the gas phase alumina mediated condensation of tetrahydrofuran (THF), tetrahydropyran (THP) or the corresponding diols with primary aromatic amines in fair to high yield.This methodology can also be used for the synthesis of 1-phenylhexahydroazepine from aniline.A mechanistic interpretation of the catalytic action of alumina is presented.