Electronic and Steric Control of Regioselectivities in Rh(I)-Catalyzed (5 + 2) Cycloadditions: Experiment and Theory
作者:Peng Liu、Lauren E. Sirois、Paul Ha-Yeon Cheong、Zhi-Xiang Yu、Ingo V. Hartung、Heiko Rieck、Paul A. Wender、K. N. Houk
DOI:10.1021/ja103253d
日期:2010.7.28
The first studies on the regioselectivity of Rh(I)-catalyzed (5 + 2) cycloadditions between vinylcyclopropanes (VCPs) and alkynes have been conducted experimentally and analyzed using density functional theory (DFT). The previously unexplored regiochemical consequences for this catalytic, intermolecular cycloaddition were determined by studying the reactions of several substituted VCPs with a range
Rhodium Dinaphthocyclooctatetraene Complexes: Synthesis, Characterization and Catalytic Activity in [5+2] Cycloadditions
作者:Paul A. Wender、Adam B. Lesser、Lauren E. Sirois
DOI:10.1002/anie.201108270
日期:2012.3.12
Rh COT in the act: A Ni0‐catalyzed [2+2+2+2] cycloaddition provides a high‐yielding, scalable synthesis of the ligand dinaphtho[a,e]cyclooctatetraene (dnCOT). dnCOT complexation with RhI gives [Rh(dnCOT)(MeCN)2]SbF6 (see scheme), an excellent catalyst for [5+2] cycloadditions of vinylcyclopropanes and π‐systems with impressive functional group compatibility.