Part I. Total Synthesis and Structural Revision of (±)-Tricholomalides A and B. Part II. Synthetic Studies towards (+)-Cortistatin A

The first part describes the total synthesis and structural revision of (±)-tricholomalides A and B. The synthetic strategy started from a homo-Robinson annulation, followed by a ketene-olefin [2+2] cycloaddition to introduce the lactone ring. Then a Grignard-type reaction appended the isopropenyl moiety, and the synthesis of tricholomalides A and B was achieved. During the course of synthesis, the structures of tricholomalides A and B were revised. The second part describes the synthetic studies towards (+)-cortistatin A, especially the A ring functionalization. The C3 nitrogen was introduced by azide displacement, and C2 hydroxyl was built up by Luche reduction. The challenging C1 functionalization was achieved with bromine-induced methoxymethyl deprotection, and some interesting chemistry was found in this system. The synthetic endeavor set a promising stage for the total synthesis of cortistatin A.

Author dc:creator

• Wang, Zhang

• Chemistry
• Tricholoma
• Diterpenes--Synthesis

Language dc:language

English

DOI dc:identifier

https://doi.org/10.7916/D8DN4C1T

OAI identifier oai:identifier

oai:academiccommons.columbia.edu:10.7916/D8DN4C1T