Synthesis of polycyclic scaffolds via a gold-catalysed dearomative cyclisation cascade
作者:Aimee K. Clarke、James A. Rossi-Ashton、Richard J.K. Taylor、William P. Unsworth
DOI:10.1016/j.tet.2020.131392
日期:2020.8
Polycyclic scaffolds found in akuammiline alkaloid natural products can be synthesised from ynone-tethered indoles, via a gold(I)-catalysed dearomative cyclisation cascade sequence. The ynone starting materials are themselves made via a two-step modular synthesis from simple tryptamine and tryptophol derivatives.
[EN] CONVERGENT AND ENANTIOSELECTIVE TOTAL SYNTHESIS OF COMMUNESIN ANALOGS<br/>[FR] SYNTHÈSE TOTALE CONVERGENTE ET ÉNANTIOSÉLECTIVE D'ANALOGUES DE LA COMMUNESINE
申请人:MOVASSAGHI MOHAMMAD
公开号:WO2017197045A1
公开(公告)日:2017-11-16
A highly convergent biomimetic synthesis of a complex polycyclic scaffold has been successfully implemented. From these efforts, compounds having a structure of Formula (I) or a pharmaceutically acceptable salt, tautomer or stereoisomer thereof, wherein R1-R8 and m, n, r, s, t, and u are as defined herein, is provided. Methods of making such compounds are also disclosed as are methods for the treatment of cancer, various infectious diseases, and abnormal cardiovascular function.
Modular Synthesis of Polycyclic Alkaloid Scaffolds via an Enantioselective Dearomative Cascade
作者:James A. Rossi-Ashton、Aimee K. Clarke、Richard J. K. Taylor、William P. Unsworth
DOI:10.1021/acs.orglett.0c00053
日期:2020.2.7
akuammiline alkaloids can be synthesized from simple tryptamine and tryptophol derivativesvia a Ag(I)-catalyzed enantioselective dearomative cyclization cascade sequence. The complex tetracyclic scaffolds are prepared via a rapid, versatile, three-step modular synthesis from simple commercially available indole derivatives in high yields and enantiomeric excess (up to 99% yield and >99% ee).
The scope for a range of sp2-sp2 coupling protocols to elaborate the phenyl-indole, indole-oxazole, oxazole-oxazole, and quaternary carbon units in the marine natural product diazonamide A 1 are described, leading to the synthesis of the benzofuran oxazoles 11a and 18, the benzofuran/biphenyl/indole 16, and the indole-bis-oxazole, 25.