Long chain phenols. Part 17. The synthesis of 5-[(Z)-pentadec-8-enyl]resorcinol, ‘cardol monoene,’ and of 5-[(ZZ)-pentadec-8,11-dienyl]-resorcinol dimethyl ether, ‘cardol diene’ dimethyl ether
作者:Christopher J. Baylis、Stanley W. D. Odle、John H. P. Tyman
DOI:10.1039/p19810000132
日期:——
the bromide and alkylation of lithio-oct-1-yne gave 5-(pentadec-8-ynyl)resorcinol dimethyl ether which was selectively converted into the 8-(Z)-alkene. Demethylation with lithium iodide gave 5-[(Z)-pentadec-8-enyl]resorcinol which was identical to ‘cardol monoene’. Reaction of 7-(3,5-dimethoxyphenyl)heptyl bromide with the lithium derivative of OH-protected propargyl alcohol, gave after acidic treatment
合成了两种“ cardol”系列中的不饱和化合物,这是一种来自西洋参(Anacardium occidentale)的重要成分酚。3,5-二甲氧基苯甲醛在锂的存在下与OH保护的6-氯己-1-醇相互作用,经过酸处理后生成1-(3,5-二甲氧基苯基)庚烷-1,7-二醇,将其选择性地氢解为7-(3,5-二甲氧基苯基)庚-1-醇。转化为溴化物并进行硫代辛基-1-炔的烷基化,得到5-(十五烷基-8-炔基)间苯二酚二甲醚,其被选择性地转化为8-(Z)-烯烃。用碘化锂脱甲基得到5-[(Z)-十五烷-8-烯基间苯二酚,与“心单烯”相同。7-(3,5-二甲氧基苯基)庚基溴化物与OH保护的炔丙醇的锂衍生物反应,经酸处理后得到10-(3,5-二甲氧基苯基)dec-2-yn-1-ol。用戊-1-炔基溴化镁制得5-戊基-8,11-二炔基间苯二酚二甲醚。选择性氢化得到5-[(ZZ)-pentadeca-8,11-二烯基]间苯二酚二甲醚,与“