10265-82-4Relevant academic research and scientific papers
An efficient approach to quinolines via Friedlaender synthesis catalyzed by cuprous triflate
Soleimani, Ebrahim,Khodaei, Mohammad Mehdi,Batooie, Nasim,Samadi, Saadi
, p. 212 - 213 (2010)
A mild and efficient route for the synthesis of quinolines utilizing cuprous triflate (Cu(OTf)2) as a novel catalyst via Friedlaender annulation in excellent yields at room temperature under solvent-free conditions was described.
Efficient Friedlaender synthesis of quinoline derivatives from 2-aminoarylketones and carbonyl compounds mediated by recyclable PEG-supported sulfonic acid
Zhang, Xiao-Liang,Wang, Qiu-Ying,Sheng, Shou-Ri,Wang, Qing,Liu, Xiao-Ling
, p. 3293 - 3304 (2009)
2-Aminoarylketones undergo smooth condensation with α-methylene ketones in the presence of 10 mol% of poly(ethylene glycol) (PEG)-supported sulfonic acid under mild reaction conditions to afford the corresponding poly-substituted quinolines in excellent y
Green approach for the efficient synthesis of quinolines promoted by citric acid
Enugala, Ramu,Nuvvula, Sreelatha,Kotra, Vijay,Varala, Ravi,Adapa, Srinivas R.
, p. 2523 - 2533 (2008)
Citric acid promoted Friedlander synthesis of a mini-library of poly substituted quinolines (30 examples) at 100 °C under solvent-free conditions was achieved in moderate to excellent yields (54-99%). The method is simple, cost-effective and environmental
Dowex-50w promoted friedlaender synthesis of substituted quinolines under solvent-free conditions
Wang, Huey-Min,Hou, Rei-Sheu,Du, Hau-Dung,Kang, Iou-Jiun,Chen, Ling-Ching
, p. 331 - 338 (2011)
An efficient method for the synthesis of substituted quinolines using Dowex-50W ion exchange resin as reusable eco-friendly catalyst vai Friedlaender annulation under solvent-free conditions is described. The Japan Institute of Heterocyclic Chemistry.
Synthesis of polysubstituted quinolines using cyanuric chloride as a catalyst under aqueous conditions
Bandgar, Babasaheb P.,More, Parmeshwar E.,Kamble, Vinod T.
, p. 947 - 951 (2008)
A mild, eco-friendly and efficient route for the synthesis of quinolines and polycyclic quinolines via Friedlaender annulation using cyanuric chloride as a catalyst under aqueous conditions is described.
Palladium-Catalyzed Regioselective Oxidative Annulation of Cyclohexanones and 2-Aminophenyl Ketones Using Molecular Oxygen as the Sole Oxidant
Mu, Wan-Lu,Wang, Meirong,Li, Hui-Jing,Huang, Deng-Ming,Zhang, Yi-Yun,Li, Chao-Yi,Liu, Ying,Wu, Yan-Chao
, p. 4250 - 4257 (2017)
A facile oxidative annulation of cyclohexanones and 2-aminophenyl ketones that uses molecular oxygen as the sole oxidant is described. The reaction provides a direct approach to acridines, a structural motif for a large number of fluorescent sensors, functional materials, ligands, and pharmaceuticals. In the presence of a palladium catalyst, high regioselectivity is observed when using non-symmetric 3-substituted cyclohexanones. With the use of oxygen as the terminal redox moderator, the electron gap of the global redox condensation process is filled and the reaction efficiency is significantly promoted. This protocol possesses many advantages such as using non-hazardous oxidant and readily available starting materials, high regioselectivity, and water as the only by-product. (Figure presented.).
Bioorganopromoted green Friedl?nder synthesis: a versatile new malic acid promoted solvent free approach to multisubstituted quinolines
Tufail, Fatima,Saquib, Mohammad,Singh, Swastika,Tiwari, Jyoti,Singh, Mandavi,Singh, Jaya,Singh, Jagdamba
, p. 1618 - 1624 (2017)
The discovery of a new, malic acid promoted, eco-friendly Friedl?nder approach to varied multisubstituted quinolines is disclosed. To the best of our knowledge, this is the first report on the use of malic acid, classified as one of the 12 biobased hot molecules by the US Department of Energy, as an organopromoter in organic synthesis and includes many benefits like wide substrate scope, solvent free ambient reaction conditions, short reaction times, operational simplicity, cost effectiveness, high atom economy, good to excellent yields, and recylability of the organopromoter, making it a valuable green alternative to the existing methods. The versatility and practicability of the developed method was further established by its successful application towards the targeted synthesis of some important quinoline molecules and successful scale up.
Gd(OTf)3-[Bmim][PF6]: A novel and recyclable catalytic system for the synthesis of quinolines
Wu, Jian-Long,Hou, Rei-Sheu,Wang, Huey-Min,Kang, Iou-Jiun,Chen, Ling-Ching
, p. 867 - 872 (2009)
A mild and efficient route for the synthesis of quinolines and polycyclic quinolines utilizing Gadolinium triflate (Gd(OTf)3) as a novel catalyst via Friedlaender annulation in ionic liquid 1-n-butyl-3- methylimidazolium hexafluorophosphate [Bm
Catalytic properties and acidity of 1,2-benzenedisulfonimide and some of its derivatives. An experimental and computational study
Barbero, Margherita,Berto, Silvia,Cadamuro, Silvano,Daniele, Pier Giuseppe,Dughera, Stefano,Ghigo, Giovanni
, p. 3212 - 3217 (2013)
1,2-Benzenedisulfonimide (1) has previously been found to be an excellent and, importantly, safe Br?nsted acid catalyst. In this work we present the results of a search for derivatives of 1 that are more acidic and effective. Instead of blindly synthesizing a series of analogues, we have carried out a screening process in which the pKa of 1 and a set of its derivatives were calculated. The calculated pKa values were confirmed experimentally by carrying out determination through potentiometric titrations of some of the compounds: 1, 4-methyl and 4-nitro derivatives of 1. The calculations indicated that the dinitro and 4-nitro derivatives are among the best candidates for the synthesis. The latter was obtained in good yields and tested as a catalyst. Results were excellent as the reactions took place more quickly and at lower temperatures in all cases, and in a number of cases it was even possible to reduce the amount of catalyst.
Friedlaender quinoline synthesis catalyzed by M(HSO4) n (M=Al, Mg, Ca) under solvent-free conditions
Niknam, Khodabakhsh,Zolfigol, Mohammad Ali,Dehghani, Amin
, p. 2513 - 2521 (2008)
Polysubstituted quinolines were synthesized from the 2-aminobenzophenone, ethylacetoacetate or ketones in the presence of metal hydrogen sulfates [M(HSO4)n] in good to high yields at 70 °C under solvent-free conditions. The Japan Ins
