α,β-Epoxy Sulfoxides as Useful Intermediates in Organic Synthesis. X. An Improved Synthesis of α,β-Unsaturated Carbonyl Compounds from Carbonyl Compounds with Carbon Homologation through α,β-Epoxy Sulfoxides
作者:Tsuyoshi Satoh、Masayuki Itoh、Teruhiko Ohara、Koji Yamakawa
DOI:10.1246/bcsj.60.1839
日期:1987.5
derived from ketones and chloromethyl phenyl sulfoxide or 1-chloroalkyl phenyl sulfoxides with lithium perchlorate in the presence of tributylphosphine oxide in toluene at 110 °C for about 1–3 h gave α,β-unsaturated aldehydes or α,β-unsaturated ketones in high yields. In contrast to these results, the α,β-epoxy sulfoxides derived from aldehydes did not give the desired α,β-unsaturated ketones. In this
在三丁基氧化膦的存在下,在甲苯中,在 110 °C 的条件下,用高氯酸锂处理衍生自酮和氯甲基苯亚砜或 1-氯烷基苯亚砜的 α,β-环氧亚砜约 1-3 小时,得到 α,β-不饱和醛或高产率的 α,β-不饱和酮。与这些结果相反,衍生自醛的 α,β-环氧亚砜没有得到所需的 α,β-不饱和酮。在这种情况下,用苯硫醇和间氯过苯甲酸依次处理 α,β-环氧亚砜,得到 α-苯基亚磺酰化酮,将其在 110°C 的甲苯中加热,以良好的总产率得到所需的烯酮。通过该方法获得的α,β-不饱和醛的氧化以高产率得到α,β-不饱和羧酸。