The Formal Total Synthesis of FR252921 - An Immunosuppressant
作者:J. S. Yadav、Sandip Sengupta
DOI:10.1002/ejoc.201201097
日期:2013.1
The formal total synthesis of FR252921 is described. The key steps include the preparation of three fragments starting from 1,4-butanediol, (R)-malic acid, and prenol, respectively, followed by two consecutive peptide couplings of the three fragments. Other key steps involve an allene-type rearrangement or enyne isomerization to install the triene moiety, a Seebach methylation, a Julia olefination