The Total Synthesis of Dynemicin A Leading to Development of a Fully Contained Bioreductively Activated Enediyne Prodrug
作者:Matthew D. Shair、Tae Young Yoon、Karoline K. Mosny、T. C. Chou、Samuel J. Danishefsky
DOI:10.1021/ja960040w
日期:1996.1.1
The title compound has been synthesized as its racemate in 33 steps. An intramolecular Diels−Alder reaction (see Scheme 5, 24 → 25) was used to provide control over the eventual cis C4−C7 relationship. The installation of another cis related ethynyl group at C2 arose from transformation 40 → 42 (see Scheme 8) whose directionality is governed by a benzophenone ketal functioning as a temporary steric