oic acids from the chiral pool is described. The phenylseleno esters derived from these acids undergo cyclization with tributyltin hydride to give mixtures of cyclohexanones and cycloheptanones. The inclusion of the appropriate four carbon side chain at C-7 leads, via a tandem radical cyclization process, to the title compounds in moderate yield.
描述了从手性池制备赤型和苏型4,5-二羟基庚基6-烯酸的
丙酮化物衍
生物。衍生自这些酸的苯基
硒烯酸酯与氢化三
丁基锡进行环化,得到
环己酮和
环庚酮的混合物。通过串联自由基环化过程,在C-7处包含适当的四个碳侧链,从而以中等收率得到标题化合物。