Enantioselective Synthesis of Alkyl-Branched Alkanes. Synthesis of the Stereoisomers of 7,11-Dimethylheptadecane and 7-Methylheptadecane, Components of the Pheromone of <i>Lambdina</i> Species
作者:David D. Díaz、Víctor S. Martín
DOI:10.1021/jo0055436
日期:2000.11.1
The stereoisomers of 7,11-dimethylheptadecane and 7-methylheptadecane have been synthesized. The key step used has been the intramolecular hydride transfer from a secondary gamma-benzyloxy group with defined absolute stereochemistry to a cation generated by Lewis acid treatment of the suitable tertiary Co(2)(CO)(6)-complexed propargylic alcohol. The application of this method provided stereochemically
已经合成了7,11-二甲基十七烷和7-甲基十七烷的立体异构体。使用的关键步骤是分子内氢化物从具有定义的绝对立体化学的仲γ-苄氧基转移到通过路易斯酸处理合适的叔Co(2)(CO)(6)-复杂的炔丙醇而生成的阳离子。该方法的应用提供了立体化学定义的α-烷基-γ-羟基-乙炔,所述α-烷基-γ-羟基-乙炔在氢化并进一步还原性除去羟基后产生仲烷基烃。