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.
Synthesis and catalytic activity of rhodium diene complexes bearing indenyl-type fullerene η5-ligand
作者:Motoki Toganoh、Yutaka Matsuo、Eiichi Nakamura
DOI:10.1016/s0022-328x(03)00465-0
日期:2003.10
Rhodium eta(5)-complexes bearing an indenyl-type fullerene ligand, Rh[C-60(PhCH2)(2)Ph](cod) (2), Rh[C-60(PhCH2)(2)Ph](nbd) (3) and Rh(C70Ph3)(cod) (4), have been synthesized from the corresponding fullerene tri-adducts in 93-96% yields. X-ray crystallographic analysis of 4 indicated that the structure of 4 is similar to that of Rh(Ind)(cod). The rhodium complex 2 catalyzes alkyne trimerization reactions and hydroboration reactions. (C) 2003 Elsevier B.V. All rights reserved.