Results 91 to 100 of about 14,696 (253)

Radical Fluoroalkylation Reactions [PDF]

, 2018
Recent protocols and reactions for catalytic radical perfluoroalkylations will be described. The production of perfluoroalkyl radicals (RF = CnF2n+1, n ≥ 2), which effect both addition and substitution reactions on organic substrates, can be realized ...
Barata Vallejo, Sebastian, Cooke, María Victoria, Postigo, A.   +2 more
core   +1 more source

Studies in Benzimidazo Thiazolo Quinoxalines and Benzimidazo Thiazino Quinoxalines

, 1970
Benzimidazo (2', 1': 2, 3) thiazolo (4, 5-b) quinoxalines and 7H-benzimidazo (1', 2': 4, 5) (1 : 4) thiazino (2, 3-b) quinoxalines have been synthesised by the condensations of 2-mercapto benzimidazoles with 2 : 3-dichloro quinoxalines and 2-(mercaptomethyl) benzimidazole with 2 : 3-dichloro quinoxalines respectively.
Simran Singh, Singh, Chanan, K. S. Narang   +2 more
openaire   +1 more source

Exploring novel antitubercular agents: Innovative design of 2,3-diaryl-quinoxalines targeting DprE1 for effective tuberculosis treatment

Open Chemistry
The rising instances of drug resistance in Mycobacterium tuberculosis strains pose a significant global health challenge. Conventional tuberculosis (TB) treatments, which typically involve multiple antibiotics, face hurdles like drug resistance, reduced ...
Sharma Kirti, Sharma Atul, Sanduja Mohit, Jogpal Vikas, Mishra Asim Kumar, Kumar Girish, Virmani Tarun, Noman Omar M., Alhalmi Abdulsalam   +8 more
doaj   +1 more source

Synthetic strategies for 5- and 6-membered ring azaheterocycles facilitated by iminyl radicals [PDF]

, 2016
The author thanks EaStCHEM for financial support.The totality of chemical space is so immense that only a small fraction can ever be explored. Computational searching has indicated that bioactivity is associated with a comparatively small number of ring ...
Walton, John Christopher
core   +2 more sources

Continuous-flow catalytic asymmetric hydrogenations: Reaction optimization using FTIR inline analysis

Beilstein Journal of Organic Chemistry, 2012
The asymmetric organocatalytic hydrogenation of benzoxazines, quinolines, quinoxalines and 3H-indoles in continuous-flow microreactors has been developed.
Magnus Rueping, Teerawut Bootwicha, Erli Sugiono   +2 more
doaj   +1 more source

Polyphenylquinoxalines via Aromatic Nucleophilic Displacement [PDF]

Polyphenylquinoxalines are produced by an aromatic nucleophilic displacement reaction involving an activated aromatic dihalide with an appropriate quinoxaline monomer. Polyphenylquinoxalines are high temperature thermoplastics used as adhesives, coatings,
Connell, John W., Hergenrother, Paul M.
core   +1 more source

Iron(III) promoted oxidative annulation of benzylic C-H bonds in (α-amino)arylacetic acids for synthesis of 4-aryl pyrrolo[1,2-a]quinoxalines

Vietnam Journal of Science, Technology and Engineering, 2023
Using amino acids for synthesis of heterocycles is a synthetically promising field. However, developing the practical methods for transformations of amino acids into heterocycles is still challenging.
Tuan Hoang Ho, Tung Thanh Nguyen, Tran Hoang Bao Ngo, Nam Thanh Son Phan   +3 more
doaj  

Efficient Syntheses of Diverse N-Heterocycles: The Molybdenum(VI)-Catalyzed Reductive Cyclization of Nitroarenes using Pinacol as a Deoxygenating­ Agent

SynOpen, 2018
Molybdenum(VI)-catalyzed domino reductive cyclization of nitroarenes has been devised for the syntheses of 1,4-benzoxazines and 1,4-benzothiazines in the presence of pinacol as deoxygenating agent.
Raghuram Gujjarappa, Nagaraju Vodnala, Arup K. Kabi, Dhananjaya Kaldhi, Mohan Kumar, Uwe Beifuss, Chandi C. Malakar   +6 more
doaj   +1 more source

Electronic effects in the cyclocondensation of benzil [PDF]

, 2010
Electronic effects are important directing forces in the course of chem. reactions. Small differences in these effects can bring about considerable changes in the results of very similar reactions.
Nagendrappa, G.
core   +1 more source

Ni@Zeolite-Y Nano-Porous: Preparation and Application as a High Efficient Catalyst for Facile Synthesis of Quinoxaline, Pyridopyrazine, and Indoloquinoxaline Derivatives [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2019
In this research, by a simple and modified method, nanoporous of Ni(II) ion loaded Y-type zeolite (NNZ) was designed and applied as a novel highly efficient catalyst for the synthesis of quinoxalines, pyrido[2,3-b]pyrazines, and indolo[2,3-b]quinoxalines
Mehdi Kalhor, Zahra Seyedzade
doaj