18707-43-2

Basic information

• Product Name: N-Cyclohexyl-N-methylaniline
• Synonyms: N-Cyclohexyl-N-methylaniline
• CAS NO: 18707-43-2
• Molecular Formula: C₁₃H₁₉N
• Molecular Weight: 0
• Mol File: 18707-43-2.mol

Chemical Properties

• Appearance: /
• CAS DataBase Reference: N-Cyclohexyl-N-methylaniline(CAS DataBase Reference)
• NIST Chemistry Reference: N-Cyclohexyl-N-methylaniline(18707-43-2)
• EPA Substance Registry System: N-Cyclohexyl-N-methylaniline(18707-43-2)

Safety Data

• Hazardous Substances Data: 18707-43-2(Hazardous Substances Data)

Usage

Synthesis Reference(s)

Synthesis, p. 116, 1975 DOI: 10.1055/s-1975-23680

Upstream product

• 1821-36-9 N-phenyl-2-cyclohexylamine 
• 77-78-1 dimethyl sulfate 
• 10468-26-5 N-cyclohexenyl-N-methylbenzenamine 
• 2739-12-0 N-methylaniline hydrochloride 
• 108-94-1 cyclohexanone 
• 100-61-8 N-methylaniline 
• 87100-15-0 cyclohexylboronic acid pinacol ester 
• 100-60-7 N-methylcyclohexylamine 
• 615-42-9 1,2-Diiodobenzene 
• 614-30-2 N-methyl-N-phenyl-benzenemethanamine 
• 64-18-6 formic acid 
• 24388-23-6 2-phenyl-4,4,5,5-tetramethyl-1,3,2-dioxoborole 
• 98-80-6 phenylboronic acid 
• 62-53-3 aniline 

Downstream Products

• 88799-11-5 4-bromo-N-cyclohexyl-N-methylaniline 
• 87725-00-6 2,6-bis(N-methyl-N-cyclohexyl-4'-aminobenzoyl)pyridine 
• 25754-75-0 N-cyclohexyl-N-methyl-2,4-dinitroaniline 

Relevant articles and documents

Visible light-induced N-methyl activation of unsymmetric tertiary amines

In the presence of methylene group, selective N-methyl activation of tertiary amines has been accomplished with the aid of visible light using organic photocatalyst under air. This protocol explores numerous aliphatic and aromatic substituted tetra-hydroquinoline analogues from various tertiary amines and maleimides. Furthermore, this approach was applied to activate the methyl group of N-methyl carbazole to generate the biologically active molecule.

Dual Photoredox/Cobaloxime Catalysis for Cross-Dehydrogenative α-Heteroarylation of Amines

We report a dual-catalytic platform for the cross-dehydrogenative-coupling between (benzo-)thiazoles and amines which combines low loadings of an iridium photoredox catalyst and a cobaloxime catalyst under blue light irradiation. This transformation occurs without stoichiometric oxidants, giving products in moderate to excellent yields. DFT calculations support the key role of Co(II) for rearomatization of the radical-addition intermediate to generate the product.

Alcohol promoted N -methylation of anilines with CO2/H2over a cobalt catalyst under mild conditions

N-Methylation of amines with CO2/H2 to N-methylamines over non-noble metal catalysts is very interesting but remains challenging. Herein, we present an alcohol (e.g., ethanol) promoted strategy for the N-methylation of anilines with CO2/H2 with high efficiency under mild conditions (e.g., 125 °C), which is achieved over a cobalt catalytic system composed of Co(OAc)2·4H2O, triphos and Sn(OTf)2. This catalytic system has a broad substrate scope and is tolerant toward a wide range of anilines and N-methyl anilines, and a series of N,N-dimethyl anilines were obtained in high yields. Mechanism investigation indicates that the alcohol solvent shifts the equilibrium of CO2 hydrogenation by forming an alkyl formate, which further reacts with the amine to produce N-formamide, and Sn(OTf)2 promotes the deoxygenative hydrogenation of N-formamides to afford N-methylamines. This is the first example of the N-methylation of amines with CO2/H2 over a cobalt catalytic system, which shows comparable performance to the reported Ru catalysts and may have promising applications.

Reductive amination of ketones/aldehydes with amines using BH3N(C2H5)3as a reductant

Herein, we report the first example of efficient reductive amination of ketones/aldehydes with amines using BH3N(C2H5)3 as a catalyst and a reductant under mild conditions, affording various tertiary and secondary amines in excellent yields. A mechanistic study indicates that BH3N(C2H5)3 plays a dual function role of promoting imine and iminium formation and serving as a reductant in reductive amination. This journal is

Air-tolerant direct reductive N-methylation of amines using formic acid via simple inorganic base catalysis

The construction of N-methyl amine moieties is an important reaction that has found numerous applications. Development of new methylation agents that are more environmentally benign than classical agents, such as iodomethane and methyl sulfate, is still highly desirable. Herein, we report a convenient protocol for direct reductive N-methylation of amines using formic acid as the methylation agent via simple inorganic base catalysis. The present protocol operates under transition-metal-free and air-tolerant conditions. Both the catalyst, K2HPO4, and the reductant, polymethylhydrosiloxane (PMHS), are cheap and easily separable from the crude reaction product mixture. Mechanistic investigations suggest that the reaction occur through the formation of an acetal intermediate followed by the C–N bond formation.

Tetracoordinate borates as catalysts for reductive formylation of amines with carbon dioxide

We report sodium trihydroxyaryl borates as the first robust tetracoordinate organoboron catalysts for reductive functionalization of CO2. These catalysts, easily synthesized from condensing boronic acids with metal hydroxides, activate main group element-hydrogen (E-H) bonds efficiently. In contrast to BX3 type boranes, boronic acids and metal-BAr4 salts, under transition metal-free conditions, sodium trihydroxyaryl borates exhibit high reactivity of reductive N-formylation toward a variety of amines (106 examples), including those with functional groups such as ester, olefin, hydroxyl, cyano, nitro, halogen, MeS-, ether groups, etc. The over-performance to catalyze formylation of challenging pyridyl amines affords a promising alternative method to the use of traditional formylation reagents. Mechanistic investigation supports electrostatic interactions as the key for Si/B-H activation, enabling alkali metal borates as versatile catalysts for hydroborylation, hydrosilylation, and reductive formylation/methylation of CO2.

Hydrogenation of (Hetero)aryl Boronate Esters with a Cyclic (Alkyl)(amino)carbene–Rhodium Complex: Direct Access to cis-Substituted Borylated Cycloalkanes and Saturated Heterocycles

We herein report the hydrogenation of substituted aryl- and heteroaryl boronate esters for the selective synthesis of cis-substituted borylated cycloalkanes and saturated heterocycles. A cyclic (alkyl)(amino)carbene-ligated rhodium complex with two dimethyl groups at the ortho-alkyl scaffold of the carbene showed high reactivity in promoting the hydrogenation, thereby enabling the hydrogenation of (hetero)arenes with retention of the synthetically valuable boronate group. This process constitutes a clean, atom-economic, as well as chemo- and stereoselective route for the generation of cis-configured, diversely substituted borylated cycloalkanes and saturated heterocycles that are usually elusive and difficult to prepare.

UiO-type metal-organic frameworks with NHC or metal-NHC functionalities for: N-methylation using CO2 as the carbon source

We demonstrate the first metal-organic framework (MOF) that catalyzes N-methylation of amines using 1 atm CO2 and phenylsilane under ambient conditions. Compared with its homogeneous analog, the incorporation of N-heterocyclic carbene (NHC) into the MOF provides more efficient catalysis with improved reaction kinetics, turnover numbers and recyclability. Moreover, the metalated NHC functionalized MOF achieves direct N-methylation of amines bearing carboxylate moieties, which are common building blocks in pharmaceutical chemistry.

Mn-Catalyzed Selective Double and Mono-N-Formylation and N-Methylation of Amines by using CO2

Functionalization of amines by using CO2 is of fundamental importance considering the abundance of amines and CO2. In this context, the catalytic formylation and methylation of amines represent convenient and successful protocols for selective CO2 utilization as a C1 building block. This study represents the first example of selective catalytic double N-formylation of aryl amines by using a dinuclear Mn complex in the presence of phenylsilane. This robust system also allows for selective formylation and methylation of amines under a range of conditions.

Iron-Catalyzed Selective N-Methylation and N-Formylation of Amines with CO2

We herein describe an efficient iron-catalyzed selective N-methylation and N-formylation of amines with CO2 and silane using mono-phosphine as ligand. With commercially available [CpFe(CO)2]2 as catalyst, Fe-catalyzed methylation of amines was achieved with triphenylphosphine as a ligand. Using tributylphosphine as a ligand, Fe-catalyzed formylation of amines was realized at a lower temperature. The method was successfully applied in the late-stage methylation and formylation of drug molecules containing amine moiety. (Figure presented.).