A Simple Synthesis of 4<i>H</i>-1,3-Benzodioxin-2-one Derivatives by Iodocyclization of<i>t</i>-Butyl<i>o</i>-Vinylphenyl Carbonate Derivatives
作者:Kazuhiro Kobayashi、Daizo Nakamura、Kazuna Miyamoto、Osamu Morikawa、Hisatoshi Konishi
DOI:10.1246/bcsj.79.489
日期:2006.3
The first general method for the synthesis of 4H-1,3-benzodioxin-2-one derivatives has been developed. Treatment of t-butyl 2-vinylphenyl carbonates with iodine in the presence of sodium hydrogencarbonate gave 4-iodomethyl-4H-1,3-benzodioxin-2-one derivatives in moderate to good yields. These iodides were reduced with tributyltin hydride to give the corresponding 4-methyl-4H-1,3-benzodioxin-2-one derivatives.
首次开发出合成 4H-1,3-苯并二恶烷-2-酮衍生物的通用方法。在碳酸氢钠存在下,用碘处理 2-乙烯基碳酸叔丁酯,可得到 4-碘甲基-4H-1,3-苯并二恶烷-2-酮衍生物,收率中等至良好。用氢化三丁基锡还原这些碘化物,可得到相应的 4-甲基-4H-1,3-苯并二恶烷-2-酮衍生物。