Triflic acid-promoted cycloisomerization of 2-alkynylphenyl isothiocyanates and isocyanates: a novel synthetic method for a variety of indole derivatives
作者:Takao Saito、Yoshihiko Sonoki、Takashi Otani、Noriki Kutsumura
DOI:10.1039/c4ob00825a
日期:——
A new approach towards the synthesis of indole derivatives via triflic acid-promoted cycloisomerization with rearrangement of 2-(alkyn-1-yl)phenyl isothiocyanates and 2-(alkyn-1-yl)phenyl isocyanates has been achieved. By this methodology, structurally diverse types of indole derivatives such as thieno- and furo-indoles, spiro-indolethiones, spiro-oxindoles, and 3-alkylidene-oxindoles were synthesized
已经实现了通过三氟甲磺酸促进的环异构化并重排2-(炔-1-基)苯基异硫氰酸酯和2-(炔-1-基)苯基异氰酸酯来合成吲哚衍生物的新方法。通过这种方法,合成了结构上不同类型的吲哚衍生物,例如噻吩-和呋喃-吲哚,螺-吲哚硫酮,螺-羟吲哚和3-亚烷基-氧吲哚。