One-pot synthesis of naphtho[2,3-b]furan-4,9-diones by sequential coupling/ring closure reactions
作者:Kazuhiro Kobayashi、Tomokazu Uneda、Masataka Kawakita、Osamu Morikawa、Hisatoshi Konishi
DOI:10.1016/s0040-4039(96)02462-8
日期:1997.2
or cuprous oxide in N-methylpiperidine or pyridine, respectively, furnished the corresponding 2-substituted naphtho[2,3-b]furan-4,9-diones in moderate to good yields. The utility of this method was demonstrated in the synthesis of a cytotoxic natural product, 2-(1-hydroxyethyl)naphtho[2,3-b]furan-4,9-dione.
在双(三苯基膦)氯化钯-碘化亚铜催化剂或氧化亚铜在N-甲基哌啶或吡啶中存在的情况下,用末端乙炔处理3-苯基碘碘-1,2,4-三氧-1,2,3,4-四氢萘分别以中等至良好的产率提供了相应的2-取代的萘并[2,3 - b ]呋喃-4,9-二酮。在合成细胞毒性天然产物2-(1-羟乙基)萘并[2,3 - b ]呋喃-4,9-二酮中证明了该方法的实用性。