Convenient synthetic route to a dehydrorotenoid via selective intramolecular aldol condensation of 1,2-diaryl diketone
作者:Jumreang Tummatorn、Prapas Khorphueng、Amorn Petsom、Nongnuch Muangsin、Narongsak Chaichit、Sophon Roengsumran
DOI:10.1016/j.tet.2007.09.032
日期:2007.11
dehydrorotenoid (1) was successfully achieved via an intramolecular aldol reaction of the corresponding 1,2-diaryl diketone intermediate. The 1,2-diaryl diketone was prepared using a ruthenium-catalyzed oxidation of the corresponding substituted diaryl acetylene. Treatment of this 1,2-diketone with l-proline induced a selective intramolecular aldol condensation reaction, forming the desired benzopyranone over
通过相应的1,2-二芳基二酮中间体的分子内醇醛缩合反应成功地完成了脱氢类胡萝卜素(1)的合成。使用相应的取代的二芳基乙炔的钌催化氧化反应制备1,2-二芳基二酮。用1-脯氨酸处理该1,2-二酮可引起选择性的分子内羟醛缩合反应,在替代的苯并呋喃上形成所需的苯并吡喃酮。脱保护,环化和脱水得到目标化合物,具有良好的总收率。