Enantioselective Total Synthesis of Pladienolide B: A Potent Spliceosome Inhibitor
摘要:
An enantioselective and convergent total synthesis of pladienolide B (1) is described. Pladienolide B binds to the SF3b complex of a spliceosome and inhibits mRNA splicing activity. The synthesis features an epoxide opening reaction, an asymmetric reduction of a beta-keto ester, and a cross metathesis strategy for the side chain synthesis.
An enantioselective synthesis of the C3–C21 segment of the macrolide immunosuppressive agent FR252921
作者:Arun K. Ghosh、Samuel Rodriguez
DOI:10.1016/j.tetlet.2016.05.067
日期:2016.6
An enantioselective synthesis of the C3–C21 segment of the novel immunosuppressant FR252921 is described. The C12 and C13 stereogenic centers were constructed by a non-aldol process utilizing optically active 4-phenylbutyrolactone. The C18 stereogenic center was installed using Braun’s highly diastereoselective acetate aldolreaction. Other key steps involved Curtius rearrangement and Horner–Wadsworth–Emmons