70382-84-2

Upstream product

• 4965-33-7 2-methyl-7-chloroquinoline 
• 100-52-7 benzaldehyde 
• 51608-60-7 phenyl N-tosyl imine 
• 758640-21-0 N-Benzylaniline 
• 100-46-9 benzylamine 
• 100-42-5 styrene 
• 100-51-6 benzyl alcohol 
• 108-42-9 3-chloro-aniline 

Downstream Products

• 234444-66-7 7-chloroquinoline-2-carboxylic acid 

Relevant academic research and scientific papers

Cobalt-catalyzed direct alkenylation of 2-methylquinolines with aldehydes via C(sp3)-H functionalization in water

The direct C(sp3)-H alkenylation of 2-methylquinolines with aldehydes as a simple methodology to afford 2-alkenylated quinolines is reported. In the presence of catalytic CoCl2 in water, the economically and ecologically sound transformation is proposed to proceed via the direct benzylic addition to the aldehyde followed by an elimination step to provide 2-alkenylated quinolines in good to excellent yield of up to 95%. Georg Thieme Verlag Stuttgart New York.

Nickel(II)-Catalyzed Selective (E)-Olefination of Methyl Heteroarenes Using Benzyl Alcohols via Acceptorless Dehydrogenative Coupling Reaction

An efficient catalytic protocol for the synthesis of selective (E)-olefins by the newly synthesized nickel complexes via greener acceptorless dehydrogenative coupling methodology is presented. Two nickel(II) N, S chelating complexes were structurally characterized with the aid of spectral and single crystal X-ray diffraction methods. Olefination of 2-methylheteroarenes with benzyl alcohols via acceptorless dehydrogenative coupling is achieved by inexpensive nickel(II) catalysts. The present olefination protocol is simple and furnishes the desired 2-alkenylheteroarenes in 35 h and yields in the range of 40–93 %. The dehydrogenative coupling reaction proceeds via the generation of an aldehyde intermediate and produces water and hydrogen as sole by-products. The wide substrate scope of this catalytic reaction covered the synthesis of drug intermediates.

NH4I-mediated sp3 C-H cross-dehydrogenative coupling of benzylamines with 2-methylquinoline for the synthesis of E-2-styrylquinolines

Without any metal catalyst, a simple and efficient method for the synthesis of E-2-styrylquinolines through sp3 C-H cross-dehydrogenative coupling of benzylamines with 2-methylquinolines mediated by NH4I under air is successfully developed. The oxidative olefination proceeded through deamination and sp3 C–H bond activation. A plausible mechanism is proposed for the construction of E-2-styrylquinolines.

Deaminative Olefination of Methyl N-Heteroarenes by an Amine Oxidase Inspired Catalyst

We explored the bioinspired o-quinone cofactor catalyzed aerobic primary amine dehydrogenation for a cascade olefination reaction with nine different methyl N-heteroarenes, including pyrimidines, pyrazines, pyridines, quinolines, quinoxolines, benzimidazoles, benzoxazoles, benzthiazoles, and triazines. An o-quinone catalyst phd (1,10-phenanthroline-5,6-dione) combined with a Br?nsted acid catalyzed the reaction. N-Heteroaryl stilbenoids were synthesized in high yields and (E)-selectivities under mild conditions using oxygen (1 atm) as the sole oxidant without needing transition-metal salt, ligand, stoichiometric base, or oxidant.

Iron/TEMPO-catalyzed direct aerobic oxidative coupling of methyl-mubstituted N-heteroazaarenes with alcohols

A novel direct oxidative coupling of methyl-substituted N-heteroazaarenes with alcohols has been developed to construct olefins under mild condition. The reaction is catalyzed by Fe(NO3)3·9H2O/TEMPO with oxygen as terminal oxidant. A variety of E-disubstituted olefins bearing diverse functional groups could be obtained selectively in moderate to excellent yields. The reaction is environmentally friendly and ligand-free.

NaCl as Catalyst and Water as Solvent: Highly E-Selective Olefination of Methyl Substituted N-Heteroarenes with Benzyl Amines and Alcohols

Oxidative coupling of benzylamines and alcohols with methyl substituted N-heteroarenes such as quinolines and quinoxalines has been achieved using chloride, a sea abundant anion as the catalyst for practical synthesis of a wide range of E-disubstituted olefins in aqueous medium. Detailed mechanistic studies and control experiments were carried out to deduce the reaction mechanism which indicated that in situ formed ClO2- is the active form of the catalyst. We have successfully carried out a 1 g scale reaction using this methodology, and five pharmaceutically relevant conjugated olefins were also synthesized by this method in moderate to good yields.

Nickel-Catalyzed Direct Alkenylation of Methyl Heteroarenes with Primary Alcohols

An efficient nickel-catalyzed acceptorless dehydrogenative coupling of methyl-substituted heteroarenes with primary alcohols is achieved using an in situ generated complex of inexpensive NiBr2 and readily available 8-aminoquinoline picolinic amide ligand. The protocol is operationally simple and scalable and furnishes a series of high-value 2-alkenylheteroarenes in good yields (up to 88percent) with exclusive E-selectivity. The reaction proceeds with the release of water and molecular hydrogen, which was analyzed through gas chromatography to validate the reaction mechanism. ?

Nickel-catalysed direct α-olefination of alkyl substituted N-heteroarenes with alcohols

Catalytic α-olefination of alkylheteroarenes with primary alcohols via dehydrogenative coupling is presented. A simple nickel catalyst system stabilised by readily available nitrogen ligands enables a series of interesting E-configured vinylarenes (confirmed by X-ray crystal-structure analysis) to be synthesised in good to excellent yields with olefin/alkane selectivity of >20:1. Hydrogen and water are generated as byproducts and quantitative determination of H2 was performed.

Direct Alkenylation of 2-Methylquinolines with Aldehydes through Synergistic Catalysis of 1,3-Dimethylbarbituric Acid and HOAc

An efficient and practical direct alkenylation of 2-methylquinolines with aldehydes has been achieved through a novel synergistic organocatalysis. The HOAc- activated 2-methylquiolines undergo a Michael addition to 1,3-dimethylbarbituric acid-activated aldehydes, followed by a retro-Michael addition to release 1,3-dimethylbarbituric acid and the target products. The transformation produced various 2-alkenylquinolines with good to excellent yields and featured mild reaction conditions, atom- and step-economy, good functional group tolerance, and operational simplicity. (Figure presented.).

Manganese-Catalyzed Direct Olefination of Methyl-Substituted Heteroarenes with Primary Alcohols

Herein, we present the first catalytic direct olefination of methyl-substituted heteroarenes with primary alcohols through an acceptorless dehydrogenative coupling. The reaction is catalyzed by a complex of the earth-abundant transition metal manganese that is stabilized by a bench-stable NNN pincer ligand derived from 2-hydrazinylpyridine. The reaction is environmentally benign, producing only hydrogen and water as byproducts. A large number of E-disubstituted olefins were selectively obtained with high efficiency.