Ruthenium Carbene Complexes with Imidazol-2-ylidene Ligands: Syntheses of Conduritol Derivatives Reveals Superior RCM Activity
作者:Lutz Ackermann、David El Tom、Alois Fürstner
DOI:10.1016/s0040-4020(99)01102-3
日期:2000.4
Syntheses of conduritol A, E and F derivatives are described using galactitol, d-mannitol and d-glucitol, respectively, as the starting materials. The key steps of this approach comprise a Tebbe olefination reaction for the preparation of dienes 15, 21 and 27 followed by ring closing metathesis (RCM) for the formation of the polyhydroxylated cyclohexene rings of the targets. A comparative study shows
描述了分别使用半乳糖醇,d-甘露糖醇和d-葡萄糖醇作为起始原料的conduritol A,E和F衍生物的合成。这种方法的关键步骤包括用于二烯的制备将Tebbe烯化反应15,21和27,随后通过闭环复分解(RCM)为靶的多羟基化的环己烯环的形成。一项比较研究表明,在催化范围内带有催化量的钌卡宾配合物3a的催化量最佳,后者带有一个PCy 3和一个2,3-二氢-1 H-咪唑-2-亚烷基配体。