1859-00-3Relevant academic research and scientific papers
Photoredox synthesis of functionalized quinazolinesviacopper-catalyzed aerobic oxidative Csp2-H annulation of amidines with terminal alkynes
Charpe, Vaibhav Pramod,Hwang, Kuo Chu,Ragupathi, Ayyakkannu,Sagadevan, Arunachalam
supporting information, p. 5024 - 5030 (2021/07/29)
We have developed a visible light-induced photo-redox copper-catalyzed oxidative Csp2-H annulation (Friedel-Crafts-type cyclization) of amidines with terminal alkynes at room temperature to synthesize functionalized quinazolines. We report copp
An eco-friendly approach for the synthesis of 1,2,5-trisubstituted and 4-amino-1,2,5-tetrasubstituted imidazoles via a multi-component condensation
Mehrabi, Hossein,Alizadeh-Bami, Farzaneh,Meydani, Azam,Besharat, Soheila
, p. 86 - 95 (2021/04/02)
The synthesis of 1,2,5-trisubstituted and 4-amino-1,2,5-tetrasubstituted imidazoles was demonstrated via a two-step cyclo-condensation reaction of aryl amines, carbonitriles, and ethyl bromopyruvate or aryl amines and arylglyoxals in ethanol heated under
Synthesis of aminoisoquinolines via Rh-catalyzed [4 + 2] annulation of benzamidamides with vinylene carbonate
Huang, Xin,Xu, Yingying,Li, Jianglian,Lai, Ruizhi,Luo, Yi,Wang, Qiantao,Yang, Zhongzhen,Wu, Yong
supporting information, p. 3518 - 3521 (2021/06/12)
A new strategy is developed for the synthesis of 1-aminoisoquinoline derivatives. This Rh(III)-catalyzed [4 + 2] annulation reaction employs benzamidines as efficient directing groups and the vinylene carbonate as an acetylene surrogate. Additionally, the reaction features broad substrate scopes and good yields, only producing carbonate anion as byproduct.
Transition-Metal-Free Synthesis of 1,2-diphenyl-1H-benzo[d] Imidazole Derivatives from N-phenylbenzimidamides and Cyclohexanones
Lu, Guoqiang,Luo, Nan,Hu, Fangpeng,Ban, Zihui,Zhan, Zhenzhen,Huang, Guo-Sheng
supporting information, p. 487 - 492 (2019/12/12)
A transition-metal-free strategy for the formation of 1,2-diphenyl-1H-benzo[d] imidazoles from N-phenylbenzimidamides and cyclohexanones is introduced. This is the first report on the direct synthesis of 1,2-diphenyl-1H-benzo[d] imidazoles from cyclohexanones and N-phenylbenzimidamides via iodine- promoted oxidative cyclization. Non-aromatic cyclohexanones were smoothly dehydrogenated, and acted as an aryl source using oxygen as a green oxidant. The catalytic use of iodine makes this method quite simple, more economical and convenient. Under optimized conditions, various substituted 1,2-diphenyl-1H-benzo[d] imidazoles were smoothly reacted, and the desired substituted imidazoles were generated with moderate to excellent yields. (Figure presented.).
Practical Synthesis of Benzimidazo[1,2- A[quinolines via Rh(III)-Catalyzed C-H Activation Cascade Reaction from Imidamides and Anthranils
Hu, Yao,Wang, Ting,Liu, Yanzhao,Nie, Ruifang,Yang, Ninghong,Wang, Qiantao,Li, Guo-Bo,Wu, Yong
supporting information, p. 501 - 504 (2020/01/31)
We report a novel and practical one-pot Rh(III)-catalyzed strategy to construct benzimidazo[1,2-a]quinolines from readily available imidamides and anthranils. The cascade reaction proceeds via a C-H amination-cyclization-cyclization process in ionic liquid without any additives and possesses simple operation, moderate-to-high yield, and broad substrate scope features, which will provide the reference for the construction of biologically active fused benzimidazoles.
Oxidative Cyclization Approach to Benzimidazole Libraries
Arnold, Eric P.,Mondal, Prolay K.,Schmitt, Daniel C.
supporting information, p. 1 - 5 (2020/02/20)
An efficient approach to the parallel synthesis of benzimidazoles from anilines is described. Library approaches to vary the N1 and C2 vectors of benzimidazoles are well established; however, C4-C7 variation has traditionally relied on 1,2-dianiline build
Metal-Free Synthesis of Polysubstituted Imidazolinone Through Cyclization of Amidines with 2-Substituted Acrylates
Liu, Zhen,Zhang, Yan-Shun,Wei, Yin,Shi, Min
supporting information, p. 1093 - 1099 (2020/02/27)
Polysubstituted imidazolinones were synthesized in a facile metal-free cascade nucleophilic cyclization of easily available amidines and 2-substituted acrylates. This protocol is distinguished by simple, mild, and catalyst-free reaction conditions with a broad substrate scope, affording the desired products in moderate to good yields and providing an efficient strategy for synthesis of polysubstituted imidazolinone.
Synthesis of 1,2,4,5-tetrasubstituted imidazoles and 2,4,5,6-tetrasubstituted pyrimidines: three-component, the one-pot reaction of arylamidines, malononitrile, and arylglyoxals or aryl aldehydes
Alizadeh-Bami, Farzaneh,Hajipour, Mina,Mehrabi, Hossein,Rezazadeh-Jabalbarezi, Fatemeh
, (2020/07/16)
A highly efficient one-pot synthesis of the 1,2,4,5-tetrasubstituted imidazoles and 2,4,5,6-tetrasubstituted pyrimidines through an arylamidine, malononitrile, and carbonyl compound by using Et3N in CH3CN at reflux conditions was dev
Eco-friendly Synthesis of 3-(Aryl)-2,6-diphenylpyrimidin-4(3H)-ones, Ethyl-1-(aryl)-1,6-dihydro-2-(aryl)-6-oxopyrimidine-4-carboxylates and 6-(4-Arylphenyl)-2-isopropylpyrimidin-4(3H)-one
Anantoju, Kishore Kumar,Eppakayala, Laxminarayana,Maringanti, Thirumala Chary
, p. 845 - 850 (2019/03/07)
In present communication, we report the synthesis of pyrimidin-4(3H)-one derivatives by microwave irradiation in good yields and less reaction time. All titled compounds were characterized by IR, NMR and Mass spectral analyses.
Acid-catalyzed synthesis of imidazole derivatives via N-phenylbenzimidamides and sulfoxonium ylides cyclization
Tian, Yuan,Qin, Mingda,Yang, Xueying,Zhang, Xueguo,Liu, Yafeng,Guo, Xin,Chen, Baohua
supporting information, p. 2817 - 2823 (2019/04/13)
A straightforward method to synthesize imidazole derivatives from amidines and sulfoxonium ylides catalyzed by acids is reported in this study. Specifically, catalyzed by trifluoroacetic acid in DCE solvents can improve synthesis efficiency under metal-fr
