Synthesis of
4H
‐chromene‐isoxazole hybrids via
ortho
‐hydroxy directing cyclization of isoxazole‐styrenes and Michael addition of imino‐chromenes in aqueous medium
摘要:
AbstractA green, efficient, and one‐pot method synthesis of functionalized 4H‐chromene‐isoxazole hybrids is reported via o‐hydroxy group directing cyclization of isoxazole‐styrenes and Michael addition of 3,5‐dimethyl‐4‐nitroisoxazole on 2‐imino‐2H‐chromene‐3‐carbonitrile (independent methods). The developed methodology was further extended for nitromethane, malononitrile, and alkylcyanoacetates as Michael donors.
Eco-friendly, one pot synthesis of chromene and pyridine nucleus initiated by visible light.
环保的,一锅法合成由可见光引发的咔啉和吡啶核。
Chemical and electrocatalytic cascade cyclization of salicylaldehyde with three molecules of malononitrile: ‘one-pot’ simple and efficient way to the chromeno[2,3-b]pyridine scaffold
作者:Michail N. Elinson、Sergey V. Gorbunov、Anatoly N. Vereshchagin、Ruslan F. Nasybullin、Alexander S. Goloveshkin、Ivan S. Bushmarinov、Mikhail P. Egorov
DOI:10.1016/j.tet.2014.09.066
日期:2014.11
‘one-pot’ simple and efficient transformation of salicylaldehyde and three molecules of malononitrile into the chromeno[2,3-b]pyridine systems. Chemical and electrochemical methods result in direct ‘one-pot’ formation of chromeno[2,3-b]pyridines in 60–90% yields. The implication of electrocatalysis in complex cascade cyclization reaction is an efficientapproach to medicinallyrelevant chromeno[2,3-b]pyridines—the
人们发现了一种新型的催化级联环化反应:将水杨醛和三个分子的丙二腈直接“一锅”简单有效地转化为铬诺[2,3- b ]吡啶体系。化学和电化学方法可以直接“一锅法”形成铬诺[2,3- b ]吡啶,产率为60-90%。电催化在复杂级联环化反应中的意义是一种有效地用于药用铬诺[2,3- b]的方法]吡啶-具有显着的抗组氨酸,抗风湿和抗哮喘活性的有前途的小分子配体。从面向多样性的大规模方法的观点来看,电催化方法是有益的,并且代表了用于级联反应策略的快速有效和环境友好的合成概念。
O'Callaghan, Conor N.; McMurry, T. Brian; O'Brien, John E., Journal of the Chemical Society. Perkin transactions I, 1995, # 4, p. 417 - 420
作者:O'Callaghan, Conor N.、McMurry, T. Brian、O'Brien, John E.
DOI:——
日期:——
O'Callaghan, Conor O.; McMurry, T. Brian H.; O'Brien, John E., Journal of Chemical Research, Miniprint, 1997, # 9, p. 2101 - 2122
作者:O'Callaghan, Conor O.、McMurry, T. Brian H.、O'Brien, John E.、Draper, Sylvia M.
DOI:——
日期:——
Synthesis of
<scp>4</scp>
<i>H</i>
‐chromene‐isoxazole hybrids via
<i>ortho</i>
‐hydroxy directing cyclization of isoxazole‐styrenes and Michael addition of imino‐chromenes in aqueous medium
作者:Sakkani Nagaraju、Kota Sathish、Dhurke Kashinath
DOI:10.1002/jhet.4251
日期:2021.6
AbstractA green, efficient, and one‐pot method synthesis of functionalized 4H‐chromene‐isoxazole hybrids is reported via o‐hydroxy group directing cyclization of isoxazole‐styrenes and Michael addition of 3,5‐dimethyl‐4‐nitroisoxazole on 2‐imino‐2H‐chromene‐3‐carbonitrile (independent methods). The developed methodology was further extended for nitromethane, malononitrile, and alkylcyanoacetates as Michael donors.