105688-75-3

Upstream product

• 105688-73-1 (E)-3-(4-Chloro-phenylamino)-2-phenyl-propenal 
• 122-78-1 phenylacetaldehyde 
• 106-47-8 4-chloro-aniline 
• 37585-25-4 2-amino-5-chlorobenzyl alcohol 
• 536-74-3 phenylacetylene 
• 67-68-5 dimethyl sulfoxide 
• 100-52-7 benzaldehyde 
• 3496-32-0 phenylketene 
• 932-98-9 1-chloro-4-nitroso-benzene 
• 70-11-1 α-bromoacetophenone 
• 5153-67-3 nitrostyrene 
• 53181-22-9 2-[(4-chlorophenyl)amino]-1-phenylethanone 
• 6628-86-0 5-chloro-2-nitrobenzaldehyde 
• 1416801-72-3 6-chloro-3-iodoquinoline 

Relevant academic research and scientific papers

Regioselective Synthesis of C-3-Functionalized Quinolines via Hetero-Diels-Alder Cycloaddition of Azadienes with Terminal Alkynes

A highly efficient metal and protection-free approach for the regioselective synthesis of C-3-functionalized quinolines from azadienes (in situ generated from 2-aminobenzyl alcohol) and terminal alkynes through [4 + 2] cycloaddition has been developed. An unprecedented reaction of 2-aminobenzyl alcohol with 1,3- and 1,4-diethynylbenzene provided the C-3 tolylquinolines via [4 + 2] HDA and oxidative decarboxylation. The -NH2 group directed mechanistic approach was well supported by the control experiments and deuterium-labeling studies and by isolating the azadiene intermediate. The reactivity and selectivity of unprotected azadiene in metal-free base-assisted hetero-Diels-Alder reaction is exploited to quickly assemble an important class of C-3-functionalized quinolines, which are difficult to access.

[3+1+1+1] Annulation to the Pyridine Structure in Quinoline Molecules Based on DMSO as a Nonadjacent Dual-Methine Synthon: Simple Synthesis of 3-Arylquinolines from Arylaldehydes, Arylamines, and DMSO

A [3+1+1+1] annulation of arylamines, arylaldehydes, and dimethyl sulfoxide (DMSO) to the pyridine structure in quinolines using DMSO as a nonadjacent dual-methine (═CH?) synthon is disclosed. In this annulation, arylamines provide two carbon atoms and one nitrogen atom, arylaldehydes furnish one carbon atom, and DMSO provides two nonadjacent methines (═CH?) to the pyridine ring in quinoline molecules. This annulation provides a simple approach for the synthesis of 3-arylquinolines from readily available substrates in useful yields. On the basis of the control experiments and the literature, a plausible mechanism is proposed.

Method for preparing 3 - arylquinoline

The invention discloses a method for preparing 3 - arylquinoline, which is carried out in an oxygen-containing atmosphere, ortho-amine arylmethanol and aryl formaldehyde in DMSO-solution system containing an alkali to obtain 3 -arylquinoline compounds. In 3 - arylquinoline compound structure prepared by the method, 2 carbon atoms are provided by DMSO, aryl groups at 3 carbon atoms and 3 positions are provided by aryl formaldehyde, and all other atoms in the quinoline compound structure are provided by raw material o-amido aryl methanol. The method for synthesizing 3 - arylquinoline has the advantages of wide raw material sources, environmental friendliness, low price and simple operation, and is beneficial to industrial production.

Unexpected Annulation between 2-Aminobenzyl Alcohols and Benzaldehydes in the Presence of DMSO: Regioselective Synthesis of Substituted Quinolines

An unexpected annulation among 2-aminobenzyl alcohols, benzaldehydes, and DMSO to quinolines has been disclosed. For the reported annulation between 2-aminobenzyl alcohols and benzaldehydes, the change of the solvent from toluene to DMSO led to the change of the product from the diheteroatomic cyclic benzoxazines to monoheteroatomic cyclic quinolines. This annulation can be used to synthesize regioselectively different substituted quinolines by the choice of different 2-amino alcohols, aldehydes, and sulfoxides as substrates. Interestingly, introducing substituent groups to the α-position of sulfoxides resulted in the interchange of the positions between benzaldehydes and sulfoxides in the product quinolines. On the basis of the control experiments and literatures, a plausible mechanism for this annulation was proposed.

Lewis acid catalyzed reactivity switch: Pseudo three-component annulation of nitrosoarenes and (epoxy)styrenes

A Lewis acid catalyzed annulation reaction via arene functionalization of nitrosoarenes and C-C cleavage of (epoxy)styrene to provide arylquinolines is reported. The Lewis acid catalyst altered the annulation pattern providing arylquinolines instead of oxazolidines. The reaction with styrene resulted in a mixture of 2,4-diarylquinoline and 4-Arylquinoline, while only 3-Arylquinoline was formed from the reaction of epoxystyrene. This journal is

Iodine monobromide catalysed regioselective synthesis of 3-arylquinolines from α-aminoacetophenones and: Trans -β-nitrostyrenes

A simple and efficient method for regioselective synthesis of 3-arylquinolines is described from α-aminoacetophenones and trans-β-nitrostyrenes using 20 mol% iodine monobromide as a catalyst in acetonitrile solvent at 80 °C. The present method involves tandem reaction of α-aminoacetophenones and trans-β-nitrostyrenes, formation of two new C-C bonds and cleavage of one C-C bond in a single step. The salient features of the protocol are metal- and oxidant-free reaction conditions, broad substrate scope, and good yields.

Cobalt(III)-Catalyzed, DMSO-Involved, and TFA-Controlled Regioselective C?H Functionalization of Anilines with Alkynes for Specific Assembly of 3-Arylquinolines

Herein, a novel cobalt(III)-catalyzed and TFA-controlled [3+2+1] cyclization of diverse anilines and terminal alkynes has been realized by using DMSO as both the solvent and the C1 source, which led to the specific synthesis of privileged 3-arylquinolines in one pot and regioselectively. Mechanistic investigations revealed that this versatile transformation might be initiated with a C?H activation process and with a 2-vinylbenzenamine species as the active intermediate. (Figure presented.).

Inhibitors of the detoxifying enzyme of the phytoalexin brassinin based on quinoline and isoquinoline scaffolds

The detoxification of the phytoalexin brassinin to indole-3-carboxaldehyde and S-methyl dithiocarbamate is catalyzed by brassinin oxidase (BOLm), an inducible fungal enzyme produced by the plant pathogen Leptosphaeria maculans. Twenty-six substituted quinolines and isoquinolines are synthesized and evaluated for antifungal activity against L. maculans and inhibition of BOLm. Eleven compounds that inhibit BOLm activity are reported, of which 3-ethyl-6-phenylquinoline displays the highest inhibitory effect. In general, substituted 3-phenylquinolines show significantly higher inhibitory activities than the corresponding 2-phenylquinolines. Overall, these results indicate that the quinoline scaffold is a good lead to design paldoxins (phytoalexin detoxification inhibitors) that inhibit the detoxification of brassinin by L. maculans.

Metal-free, ionic liquid-mediated synthesis of functionalized quinolines

An expedient and metal-free synthetic protocol for construction of substituted quinolines has been developed from anilines and phenylacetaldehydes using imidazolium cation-based ionic liquids as the reaction medium. Mechanistic analysis indicated that the reaction occurs through C-C and C-N bond formation to produce isolable 2,3-disubstituted quinoline intermediates, which undergo C-C bond cleavage to produce 3-substituted quinolines. The reaction proceeds smoothly with a range of functionalities in good to excellent yields. Advantages of this protocol include metal-free, environmentally friendly, recyclable reaction media, higher yields and shorter reaction times, and thus is promising for the efficient combinatorial synthesis of structurally diverse 2,3-disubstituted and 3-substituted quinolines.

Aerobic synthesis of substituted quinoline from aldehyde and aniline: Copper-catalyzed intermolecular C-H active and C-C formative cyclization

An efficient method for the direct synthesis of substituted quinolines from anilines and aldehydes through C-H functionalization, C-C/C-N bond formation, and C-C bond cleavage has been developed. The method is simple and practical and employs air as an ox