Second-Generation Total Synthesis of Haterumalide NA Using B-Alkyl Suzuki–Miyaura Coupling
摘要:
Second-generation total synthesis of haterumalide NA, a potent cytotoxic marine macrolide, was achieved by using B-alkyl Suzuki - Miyaura coupling and Nozaki - Hiyama - Kishi coupling as key steps (1.2% in 33 steps). Compared to our first-generation approach, the second-generation synthesis is much improved in the yield of key intermediate.
first-generation approach for ent-haterumalide NA methyl ester, this second-generation synthesis yielded much more of the key intermediate. This synthesis established the relative stereochemistry of haterumalide B. Furthermore, the structure−cytotoxicity relationships of haterumalides were investigated. The combination of macrolide and sidechain parts proved to be important to the cytotoxicity.
Second-generation total synthesis of haterumalide NA, a potent cytotoxic marine macrolide, was achieved by using B-alkyl Suzuki - Miyaura coupling and Nozaki - Hiyama - Kishi coupling as key steps (1.2% in 33 steps). Compared to our first-generation approach, the second-generation synthesis is much improved in the yield of key intermediate.
Total Synthesis of Biselide A, A Cytotoxic Macrolide of Marine Origin
Abstract The total synthesis of biselide A based on our earlier strategy of synthesizing haterumalides is reported. The highlights of this approach are the use of regioselective enzymatic hydrolysis for the installation of a C20 oxygen functional group and an asymmetric aldol reaction for the stereoselective introduction of a C3 oxygen functional group. The total synthesis of biselide A based on our