Journal
TETRAHEDRON
Volume 64, Issue 24, Pages 5800-5807Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2008.03.079
Keywords
Rh/amine catalyst; cyclotrimerization; hexa-substituted benzene
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The RhCl3-3H(2)O/i-Pr2NEt-catalyzed [2+2+2] cyclotrimerization of alkynes has been achieved. The reaction can be widely used for various alkynes and provides tri- OF hexa-substituted benzenes regioselectively in high yields. The [2+2+2] cycloaddition of diynes and alkynes is also developed, and it affords benzene derivatives in moderate to high yields. (C) 2008 Elsevier Ltd. All rights reserved.
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