Ruthenium-Catalyzed Domino Redox Bicycloisomerization. An Atom-Economical Synthesis of [3.1.0]- and [4.1.0]Carbo- and Heterocycles
作者:Barry M. Trost、Adam W. Franz
DOI:10.1021/ja1088452
日期:2010.12.29
Supporting Information Available: ESI-MS data of the reaction products formed upon addition of EDA to Co(TPP) and Co(3,5-DitBu-ChenPhyrin); DFT optimized geometries, SOMO and spin density plots of species trans-D; Tables containing ∆E, ∆EZPE, ∆G, ∆H and ∆S values of all DFT optimized geometries; free energies for olefin cyclopropanation at the b3-lyp, def-TZVP level; computed IR CO stretching frequencies
Propargyl Alcohols as β-Oxocarbenoid Precursors for the Ruthenium-Catalyzed Cyclopropanation of Unactivated Olefins by Redox Isomerization
作者:Barry M. Trost、Alexander Breder、B. Michael O’Keefe、Meera Rao、Adam W. Franz
DOI:10.1021/ja200971v
日期:2011.4.6
An atom-economical method for the direct synthesis of [3.1.0]- and [4.1.0]-bicyclic frameworks via Ru-catalyzed redoxbicycloisomerization of enynols is reported. The presented results highlight the unique reactivity profile of propargyl alcohols, which function as β-oxocarbene precursors, in the presence of a ruthenium(II) complex. Furthermore, a rare case of a formal vinylic C-H insertion reaction
报道了一种通过 Ru 催化的烯醇氧化还原双环异构化直接合成 [3.1.0]-和 [4.1.0]-双环骨架的原子经济方法。所呈现的结果突出了炔丙醇在钌 (II) 络合物存在下充当 β-氧代卡宾前体的独特反应性特征。此外,还描述了一种罕见的正式乙烯基 CH 插入反应的情况。