Synthesis of 9,10-Phenanthrenes via Palladium-Catalyzed Aryne Annulation by <i>o</i>-Halostyrenes and Formal Synthesis of (±)-Tylophorine
作者:Tuanli Yao、Haiming Zhang、Yanna Zhao
DOI:10.1021/acs.orglett.6b00558
日期:2016.6.3
A novel palladium-catalyzedannulation reaction of in situ generated arynes and o-halostyrenes has been developed. This methodology affords moderate to excellent yields of substituted phenanthrenes and is tolerant of a variety of functional groups such as nitrile, ester, amide, and ketone. This annulation chemistry has been successfully applied to the formal total synthesis of a biologically active
Synthesis of (±)-septicine and (±)-tylophorine by regioselective [3 + 2] cycloaddition
作者:Hideo Iida、Masao Tanaka、Chihiro Kibayashi
DOI:10.1039/c39830000271
日期:——
The synthesis of (±)-septicine and (±)-tylophorine, using 1,3-dipolar cycloaddition and intramolecular photocyclisation reactions as key steps, is described.
Synthesis of Phenanthro[9,10-<i>b</i>]indolizidin-9-ones, Phenanthro[9,10-<i>b</i>]quinolizidin-9-one, and Related Benzolactams by Pd(OAc)<sub>2</sub>-Catalyzed Direct Aromatic Carbonylation
Synthesis and Biological Evaluation of Tylophorine-Derived Dibenzoquinolines as Orally Active Agents: Exploration of the Role of Tylophorine E Ring on Biological Activity
作者:Yue-Zhi Lee、Cheng-Wei Yang、Hsing-Yu Hsu、Ya-Qi Qiu、Teng-Kuang Yeh、Hsin-Yu Chang、Yu-Sheng Chao、Shiow-Ju Lee
DOI:10.1021/jm300705j
日期:2012.12.13
dibenzoquinoline 33b, showed improved solubility compared to tylophorine 9a, in vivo efficacies in a lung A549 xenografted tumor mouse model and a murine paw edema model, good bioavailability, and no significant neurotoxicity (as tested by a rota-rod test for motor coordination). This is the first study to explore in detail the role of the tylophorine E ring on biological activity and very strongly suggests