Total Synthesis of Bafilomycin V<sub>1</sub>: A Methanolysis Product of the Macrolide Bafilomycin C<sub>2</sub>
作者:James A. Marshall、Nicholas D. Adams
DOI:10.1021/jo015864x
日期:2002.2.1
A synthesis of bafilomycin V(1), a methanolysis product of the macrolide natural product bafilomycin C(2), is described. The route utilizes chiral nonracemic allenylzinc reagents, prepared in situ from propargylic mesylates, to access key segments of this methyl ester. The acetylenic moieties of the derived homopropargylic alcohol adducts play an important role in further elaboration of these subunits
描述了大环内酯类天然产物bafilomycin C(2)的甲醇分解产物bafilomycin V(1)的合成。该路线利用了从炔丙基甲磺酸酯原位制备的手性非外消旋烯丙基锌试剂,以进入该甲酯的关键部分。衍生的高炔丙醇加合物的炔基部分在进一步修饰这些亚基中起重要作用。通过由乙炔衍生的乙烯基进行Stille偶联,最终得到25个碳链的最终组装,其中包含12个立体中心,α-甲氧基Z,E 1,3-二烯酸酯和其他E,E 1,3-二烯。锡烷和乙烯基碘的复杂度大致相同。尝试将几种C15羟基酸衍生物环化成16元内酯bafilomycin A(1)(液泡ATPase的有效抑制剂)。