WebAug 4, 2011 · The cycloisomerizations proceed under mild conditions, with low catalytic loadings and short reaction times. This new protocol involving an Ir (III) catalyst also promoted the cycloisomerization of nitrogen-tethered 1,6-enynes to give azabicyclo [4.1.0]heptenes, enhancing the synthetic potential of our method. Citing Literature WebOct 4, 1999 · Cyclization, Hydrocarbons, Isomerization, Ruthenium * In papers with more than one author, the asterisk indicates the name of the author to whom inquiries about the paper should be addressed. Supporting Information Available Sample procedure and characterization data for 5a, 6b − h, 10, 12, and 14 (PDF).

PtCl2-Catalyzed Cycloisomerizations of Allenynes

WebMay 17, 2016 · This Account also explores transition-metal-catalyzed cycloisomerizations, where our theoretical investigations have uncovered an unexpected reaction pathway in the [5 + 2] cycloisomerization of ynamides. This has led to the design of new phosphoramidite ligands to enable double-stereodifferentiating cycloisomerizations in both matched and ... WebSep 18, 2004 · Cycloisomerization of Oxindole-Derived 1,5-Enynes: A Calcium (II)-Catalyzed One-Pot, Solvent-free Synthesis of Phenanthridinones, 3- … lakenmakersstraat mol

Iron‐Catalyzed Cycloisomerization and C−C Bond Activation to …

WebJul 15, 2013 · Cycloisomerizations are amongst the most atom-economical methods to access valuable organic ring systems from simple acyclic starting materials. 1 1, n -Enynes have been particularly explored as cycloisomerization substrates, thus giving rise to a broad spectrum of products depending on the choice of catalyst and substrate. Webcycloisomerizations involving indenes to produce cyclohep-tadienes. As a result, our initial investigations employed the simple model 7,5 with which we screened a variety of conditions known to catalyze enyne cycloisomerizations. Several metal complex/additive combinations, including the Grubbs I and Grubbs II alkylidenes,6 Pt(PPh 3)2Cl2/PhIO,7 laken miller