Heteroannulation of arynes with N-aryl-α-aminoketones for the synthesis of unsymmetrical N-aryl-2,3-disubstituted indoles: an aryne twist of Bischler–Möhlau indole synthesis
作者:Ala Bunescu、Cyril Piemontesi、Qian Wang、Jieping Zhu
DOI:10.1039/c3cc46361c
日期:——
Reaction of 2-(trimethylsilyl)aryl triflates 1 with N-aryl-alpha-amino ketones 2 afforded N-aryl-2,3-disubstituted indoles in good to excellent yields with complete control of the substitution patterns. This methodology allowed for the first time a one-step synthesis of unsymmetrical 2,3-dialkyl substituted indoles in a regiospecific manner.
2-(三甲基甲硅烷基)芳基三氟甲磺酸酯1与N-芳基-α-氨基酮2的反应提供了N-芳基-2,3-二取代的吲哚,具有良好的产率,并且完全控制了取代模式。该方法首次允许以区域特异性方式一步合成不对称的2,3-二烷基取代的吲哚。