773091-15-9Relevant academic research and scientific papers
Reaction of 3-arylidenepropenoic acid derivatives with triethylamine and other amines; Unexpected reductions and vinylogations
Harisha, Attimogae Shivamurthy,Nayak, Suresh Parameshwar,Nagarajan, Kuppuswamy,Row, Tayur Narasingarow Guru,Hosamani, Amar A.
, p. 2880 - 2889 (2016/05/24)
Exposure of ethyl 2-cyano-3-(2-methoxy-5-nitrophenyl)acrylate 1f to triethylamine in hot ethanol resulted in the formation of the dihydro derivative 2f and vinylogue 3f in high yields. Single crystal X-ray data are provided for 3f. Similar reactions were observed for various analogues. The reaction was studied changing aryl substituent, amines and solvents. Pyridyl, thienyl analogues were also examined. The study was extended to cyclic molecules incorporating such systems like thiazolidinedione 8, 3-cyanocoumarin 9 and 4-arylidene-isoquinoline-2,4-diones 11. The last group gave vinylogated products, 4-cinnamylidene-isoquinolinediones and 4-hydroxylated species. A few examples of arylidene derivatives from malononitrile, ethyl acetoacetate, acetyl acetone and ethyl methylsufonylacetate were investigated. Ethyl cinnamate and β-nitrostyrene were unaffected. The reaction is considered to be possibly radical mediated, since addition of free radical quencher suppressed the reaction. Contrary to the effects of thermal conditions, irradiation of 1f in ethanol at 254 and 365 nm gave complex mixtures. A few other interesting observations in this study are noted: vinylogation of 1f with acetaldehyde to 3f; formation of 3f from 1f by the treatment with triethylamine, palladium carbon and reduction of 1f to 2f by triethylammonium formate in DMF.
DENGUE AND WEST NILE VIRUS PROTEASE INHIBITORS
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, (2014/10/18)
Compounds and methods of treating or preventing a Flavivirus infection in a subject are provided. The methods comprise administering to the subject a therapeutically effective amount of a compound as described herein. The methods are useful in treating and/or preventing Flavivirus infections such as, for example, West Nile Virus, Dengue Virus, and Japanese Encephalitis Virus. Methods of inhibiting a Flavivirus protease in a cell are also provided.
[5C + 1N] Annulation of 2,4-pentadienenitriles with hydroxylamine: A synthetic route to multi-substituted 2-aminopyridines
Xin, Xiaoqing,Huang, Peng,Xiang, Dexuan,Zhang, Rui,Zhao, Fengyu,Zhang, Ning,Dong, Dewen
, p. 1001 - 1006 (2013/02/26)
A facile and efficient synthetic route to multi-substituted 2-aminopyridines has been developed via a formal [5C + 1N] annulation of readily available 2,4-pentadienenitriles with hydroxylamine (NH2OH) under very mild conditions, which involves
