Late‐stage Rh(II)‐catalyzed Nitrene Transfer for the Synthesis of Guaianolide Analogs with Enhanced Antiproliferative Activity
作者:Sebastián J. Castro、José M. Padrón、Benjamin Darses、Viviana E. Nicotra、Philippe Dauban
DOI:10.1002/ejoc.202100074
日期:2021.3.26
Application of rhodium(II)‐catalyzed intermolecular nitrene transfers to naturally‐occurring guaianolide compounds led to isolating nine new derivatives that possess an amino functional group at C‐1, C‐2, C‐10, C‐11, and/or C‐13 positions. The relevance of a late‐stage C−H amination strategy in medicinal chemistry is demonstrated by the improved antiproliferative activity of the C‐2 aminated analogs
Crystal structure and stereochemistry of achalensolide, a new guaianolide from Stevia achalensis
作者:Juan C. Oberti、Virginia E. Sosa、Werner Herz、J. Siva Prasad、Virgil L. Goedken
DOI:10.1021/jo00170a033
日期:1983.11
The first 12.8β-germacrolide and other constituents from bolivian Stevia species
作者:C. Zdero、F. Bohlmann、R.M. King、H. Robinson
DOI:10.1016/0031-9422(88)80673-3
日期:1988.1
afforded several known germacranolides, guaianolides and labdane derivatives while S. samaipatensis gave four newguaianolides, one being a fulvene and twonew labdane derivatives. From S. yacomensis four new longipinene derivatives and a guaianolide were isolated. The aerial parts of S. polyphylla afforded in addition to known compounds nine further guaianolides and the first 12.8β-germacrolide. Structures