Facile Synthesis of Fluorinated Benzofuro- and Benzothieno[2,3-b]pyridines, α-Carbolines and Nucleosides Containing the α-Carboline Framework
作者:Viktor Iaroshenko、Yan Wang、Biao Zhang、Dmitriy Volochnyuk、Vyacheslav Sosnovskikh
DOI:10.1055/s-0029-1217396
日期:2009.7
Fluorinated benzofuro[2,3-b]pyridines, benzothieno[2,3-b]pyridines and 9H-pyrido[2,3-b]indoles (α-carbolines) were synthesized via regiospecific pyridine core annulation of a number of fluoro-containing 1,3-CCC-dielectrophiles to benzofuran-2-amine, benzothiophen-2-amine and 1H-indol-2-amine. Based on the 2,4-bis(trifluoromethyl)-9H-pyrido[2,3-b]indole thus synthesized, the preparative approach towards a set of nucleosides and nucleoside mimetics bearing the α-carboline framework was elaborated.
合氟苯并呋喃[2,3-b]吡啶、苯并噻吩[2,3-b]吡啶和9H-吡啶[2,3-b]吲哚(α-卡宾)通过多种含氟的1,3-CCC-双电亲体与苯并呋喃-2-胺、苯并噻吩-2-胺和1H-吲哚-2-胺进行区域选择性的吡啶核心环化反应合成。基于所合成的2,4-二(三氟甲基)-9H-吡啶[2,3-b]吲哚,进一步阐述了制备一系列具有α-卡宾结构的核苷和核苷类似物的方法。