Synthesis of highly substituted tetrahydropyrans: preparation of the C20–C28 moiety of phorboxazoles
作者:Tushar K Chakraborty、V.Ramakrishna Reddy、T.Jagadeshwar Reddy
DOI:10.1016/j.tet.2003.08.056
日期:2003.10
2-methyl-1,3-diol moiety was built by a Ti(III)-mediated ring opening reaction of a trisubstituted 2,3-epoxy alcohol precursor was employed as a common starting material for the syntheses of highly substituted tetrahydropyrans 1–5, the first one being the C20–C28 fragment of cytotoxic natural products, phorboxazoles.
丙酸酯衍生的聚酮化合物结构单元A通过三取代2,3-环氧醇前体的Ti(III)介导的开环反应而构建,其2-甲基-1,3-二醇部分被用作通用的起始原料。高度取代的四氢吡喃1 – 5的合成,第一个是细胞毒性天然产物phorboxazoles的C20–C28片段。