Application of Ring-Closing Metathesis for the Synthesis of Benzo[3,4]azepino[1,2-b]isoquinolin-9-ones
作者:Hue Thi My Van、Daulat Bikram Khadka、Thanh Nguyen Le、Su Hui Yang、Won-Jea Cho
DOI:10.1248/cpb.59.1169
日期:——
Cycloaddition reaction between toluamides and benzonitriles was applied to prepare the 3-arylisoquinolines, and their chemical transformation to the dienes 4 was performed. The ring-closing metathesis (RCM) reaction afforded the desired heterocyclic compounds, benzo[3,4]azepino[1,2-b]isoquinolinones 5 in good yield.
A facile synthesis of benzo[c]phenanthridine alkaloids: oxynitidine and oxysanguinarine using lithiated toluamide–benzonitrile cycloaddition
作者:Thanh Nguyen Le、Seong Gyoung Gang、Won-Jea Cho
DOI:10.1016/j.tetlet.2004.02.031
日期:2004.3
Benzo[c]phenanthridinealkaloids oxynitidine and oxysanguinarine were synthesized from easily available starting benzonitrile 5 and toluamide 6 using toluamide–benzonitrile cycloaddition reaction in six steps. This method is so highly efficient that it could be a more useful way for preparing fully aromatized benzo[c]phenanthridine compounds.
使用甲苯酰胺-苄腈环加成反应,通过六个步骤,由易于获得的起始苯甲腈5和甲苯酰胺6合成苯并[ c ]菲啶生物碱氧硝啶和氧山桂碱。该方法是如此高效,以至于它是制备完全芳构化的苯并[ c ]菲啶化合物的更有用的方法。
Synthesis of benzo[3,4]azepino[1,2-b]isoquinolin-9-ones from 3-arylisoquinolines via ring closing metathesis and evaluation of topoisomerase I inhibitory activity, cytotoxicity and docking study
作者:Hue Thi My Van、Daulat Bikram Khadka、Su Hui Yang、Thanh Nguyen Le、Suk Hee Cho、Chao Zhao、Ik-Soo Lee、Youngjoo Kwon、Kyung-Tae Lee、Yong-Chul Kim、Won-Jea Cho
DOI:10.1016/j.bmc.2011.08.006
日期:2011.9
3-arylisoquinolines with suitable diene moiety provided seven membered azepine rings of benzoazepinoisoquinolinones. Spectral analyses of these heterocyclic compounds demonstrated that the methyleneprotons of the azepine rings are nonequivalent. The shielding environment experienced by these geminal hydrogens differs unusually by 2.21 ppm. As expected, benzoazepinoisoquinolinones displayed potent cytotoxicity. However
Synthesis of Oxychelerythrine Using Lithiated Toluamide-Benzonitrile Cycloaddition
作者:Thanh Nguyen Le、Won-Jea Cho
DOI:10.1248/cpb.53.118
日期:——
Oxychelerythrine, benzo[c]phenanthridine alkaloid, was synthesized from easily available starting toluamide 5 and benzonitrile 6 using toluamide-benzonitrile cycloaddition reaction in 6 steps.
Total Synthesis of Oxyfagaronine, Phenolic Benzo[c]phenanthridine and General Synthetic Way of 2,3,7,8- and 2,3,8,9-Tetrasubstituted Benzo[c]phenanthridine Alkaloids
作者:Thanh Nguyen Le、Won-Jea Cho
DOI:10.1248/cpb.54.476
日期:——
Benzo[c]phenanthridine alkaloids such as oxynitidine, oxysanguinarine, oxyavicine and phenolic oxyfagaronine were synthesized from easily available starting benzonitriles 5 and toluamides 6 using a lithiated toluamide-benzonitrile cycloaddition reaction. The coupling reaction provided 3-arylisoquinolinones that were transformed to the benzo[c]phenanthridones. This method is highly efficient and could