Commercially available simple ionic liquids-promoted dehydrative carbon–carbon bond-forming reaction of diarylmethanols and triarylmethanols with pyrroles, thiophene, furan and indoles
作者:Kazumasa Funabiki、Takuya Komeda、Kouhei Nishikawa、Kentaro Yamada、Yasuhiro Kubota、Masaki Matsui
DOI:10.1016/j.tet.2014.10.004
日期:2014.12
bond-forming reaction of a variety of diarylmethanols and triarylmethanols with π-rich heteroaromatics, such as pyrroles, indole, furan, and thiophene without ring-opening and polymerization to give the corresponding not only 2-substituted pyrroles, furan, and thiophene but also 3-substituted indoles in good to excellent yields with moderate to excellent regioselectivities. These dehydrative C–C bond
两种市售的简单离子液体,即三氟甲磺酸1-乙基-3-甲基咪唑鎓和三氟甲磺酸1-乙基-2,3-二甲基咪唑鎓,可有效促进多种溶剂的无溶剂脱水碳-碳(CC)键形成反应。二芳基甲醇和三芳基甲醇,带有富含π的杂芳族化合物,例如吡咯,吲哚,呋喃和噻吩,不进行开环和聚合反应,不仅可以得到相应的2-取代的吡咯,呋喃和噻吩,而且还可以很好地制得3-取代的吲哚具有中等至优异的区域选择性的产率。这些醇类的脱水C–C键形成反应具有几个优点,例如使用化学计量的π富杂芳族化合物和离子液体,水是唯一的副产物,