作者:Kazuhiro Yoshida、Hidetoshi Takahashi、Tsuneo Imamoto
DOI:10.1002/chem.200800484
日期:2008.9.19
New synthetic approaches to substituted aromatic compounds are reported. Ring-closing olefin metathesis (RCM)/dehydration and RCM/tautomerization are the key processes in the synthesis of substituted benzenes 3 and phenols 6, respectively. Readily accessible 1,5,7-trien-4-ols 7, which are the precursors of benzenes, were prepared from beta-halo-alpha,beta-unsaturated aldehydes 11 or beta-halo-alpha
报道了取代芳族化合物的新合成方法。闭环烯烃复分解(RCM)/脱水和RCM /互变异构是分别合成取代苯3和苯酚6的关键过程。易得的1,5,7-trien-4-ols 7是苯的前体,它是利用β-卤代α,β-不饱和醛11或β-卤代α,β-不饱和酯19通过利用可靠的转化方法,其中与乙烯基金属试剂12的交叉偶联和与烯丙基金属试剂13的烯丙基化被用作碳-碳键形成反应。RCM为7,然后脱水,得到了各种各样的取代苯3。此外,通过氧化7制备的1,5,7-三烯-4-酮9的RCM,自动提供了各种取代的苯酚6。互变异构化。