作者:Dervilla M.X. Donnelly、Brendan M. Fitzpatrick、Bernadette A. O'Reilly、Jean-Pierre Finet
DOI:10.1016/s0040-4020(01)88020-0
日期:1993.9
roman-4-one derivatives was carried out in chloroform in presence of pyridine to afford moderate to quantitative yields of the corresponding hindered 3-aryl-3-phenylthiochroman-4-one derivatives. Removal of the phenylthio group by oxidation with dimethyldioxirane led to the corresponding isoflavones and 2-p-methoxyphenylisoflavones, and by reduction with a large excess of nickel boride to the isoflavanones
在吡啶存在下于氯仿中进行三乙酸芳基铅(IV)与3-(苯硫基)-苯并四氢吡喃-4-酮和2-对甲氧基苯基-3-(苯硫基)-苯并四氢吡喃酮衍生物的反应,得到氯相应的受阻3-芳基-3-苯基硫代苯并二氢吡喃-4-酮衍生物的产率中等至定量。通过用二甲基二环氧乙烷环氧化除去苯硫基团导致相应的异黄酮和2-对甲氧基苯基异黄酮,以及通过用大量过量的硼化镍还原成异黄酮和2-(4'-茴香基)-异黄酮。在2-对甲氧基苯基系列中,邻位化合物的硼化镍还原取代的3-芳基基团得到查耳酮,其在碱性催化下被环化。