Unified, Efficient, and Scalable Synthesis of Halichondrins: Zirconium/Nickel-Mediated One-Pot Ketone Synthesis as the Final Coupling Reaction
作者:Kenzo Yahata、Ning Ye、Yanran Ai、Kentaro Iso、Yoshito Kishi
DOI:10.1002/anie.201705523
日期:2017.8.28
developed Zr/Ni-mediated one-potketonesynthesis was used to couple the two halves of the final product at a late stage in the synthesis. With the use of a slight excess of the left halves, the desired ketones were isolated in yields of 80–90 %. The halichondrins were obtained from these ketones in two steps, namely desilylation and [5,5]-spiroketal formation. The new synthetic route was effective for the