A Practical Synthetic Route to Benzofuro[2,3-<i>b</i>]pyridine and Trifluoromethyl-α-carbolines
作者:Viktor Iaroshenko、Ulrich Groth、Nadiya Kryvokhyzha、Samra Obeid、Andrei Tolmachev、Thomas Wesch
DOI:10.1055/s-2008-1032042
日期:2008.2
In situ generated benzofuran-2-amine reacts with 1,3-CCC-dielectrophiles, such as CF3-containing β-diketones, 3-formylchromone, methyl-2,4-dioxopentanoate and pentafluorobenzaldehyde, and the reaction leads to the formation of benzofuro[2,3-b]pyridine ring system. By using a similar approach 4-trifluoromethyl-α-carbolines were synthesized starting from indole-2-amine.
原位生成的
苯并呋喃-2-胺与1,3-CCC-电亲体反应,例如含
CF3的
β-二酮、3-
甲醛色酮、甲基-2,4-二氧
戊酸酯和
五氟苯甲醛,该反应形成了
苯并呋喃[2,3-b]
吡啶环体系。采用类似的方法,从
吲哚-2-胺合成了4-三
氟甲基-α-卡宾。