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Sulfur‐Assisted and 1,8‐Diazabicyclo[5.4.0]undec‐7‐ene (DBU)‐Catalyzed Cyclization of 2‐Alkynylanilines for the Metal‐Free Synthesis of Indole Derivatives
Author(s) -
Zhou Hongwei,
Zhu Da,
Xing Yanpeng,
Huang Huafeng
Publication year - 2010
Publication title -
advanced synthesis and catalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.541
H-Index - 155
eISSN - 1615-4169
pISSN - 1615-4150
DOI - 10.1002/adsc.201000280
Subject(s) - chemistry , indole test , environmentally friendly , catalysis , sulfur , ene reaction , combinatorial chemistry , organic chemistry , metal , biology , ecology
Abstract A sulfur‐assisted and 1,8‐diazabicyclo[5.4.0]undec‐7‐ene (DBU)‐catalyzed cyclization of 2‐alkynylanilines for the metal‐free synthesis of indole derivatives is reported. As a result of the metal‐free process, the ready availability of the starting materials and the simple and convenient operation, the type of reaction presented here has potential utility in organic synthesis. A 10‐gram scale preparation may demonstrate the possibility of its application in the environmentally friendly synthesis of indole derivatives.