70286-37-2Relevant articles and documents
A Short Total Synthesis of Benzophenanthridine Alkaloids via a Rhodium(III)-Catalyzed C-H Ring-Opening Reaction
Aravindan, Narasingan,Jeganmohan, Masilamani
, p. 14826 - 14843 (2021/10/20)
The biologically important naturally available benzophenanthridines were prepared efficiently in three steps with overall good yields. A new synthetic methodology involving a rhodium(III) catalyzed redox-neutral ring-opening of 7-azabenzonorbornadienes with aromatic aldoximes is developed to synthesize the target molecules. The developed C-H ring-opening reaction is highly diastereoselective and compatible with various sensitive functional group substituted aromatic aldoximes as well as substituted 7-azabenzonorbornadienes. The ring-opening products were transformed into highly sensitive 13,14-dehydrobenzo phenanthridine derivatives by HCl hydrolysis. Subsequently, 13,14-dehydrobenzophenanthridines were converted into biologically important benzophenanthridine alkaloids in the presence of DDQ. A possible reaction mechanism was proposed for the C-H ring-opening reaction and supported by the deuterium labeling studies.
One-pot synthesis of alternating peptides exploiting a new polymerization technique based on Ugi's 4CC reaction
Koyama, Yasuhito,Gudeangadi, Prashant G.
supporting information, p. 3846 - 3849 (2017/04/04)
We developed a one-pot synthetic technique for alternating peptides. Central to this technique is a new, catalyst-free polymerization based on Ugi's 4CC reaction. The treatment of imines with the ambident molecules bearing both an isocyanide and a carboxylic acid afforded alternating peptides.
Solid-phase synthesis of benzothiazoles using an alkoxyamine linker
Hioki, Hideaki,Matsushita, Kimihito,Noda, Takeshi,Yamaguchi, Kota,Kubo, Miwa,Harada, Kenichi,Fukuyama, Yoshiyasu
scheme or table, p. 4337 - 4342 (2012/09/25)
An alkoxyamine linker was applied for the solid-phase synthesis of benzothiazoles. The substrate was anchored by aldoxime linkage and products were cleaved from the solid-support by aldoxime-imine exchange coupled with air-oxidation under the weakly acidi