Unsaturated Macrocyclic Compounds. VIII.1 Oxidation of Terminal Diacetylenes to Large Ring Polyacetylenes with Cupric Acetate in Pyridine. Synthesis of Five New Macrocyclic Rings2
Catalytic ring expansion, contraction, and metathesis-polymerization of cycloalkanes
作者:Ritu Ahuja、Sabuj Kundu、Alan S. Goldman、Maurice Brookhart、Brian C. Vicente、Susannah L. Scott
DOI:10.1039/b712197k
日期:——
Tandem dehydrogenation-olefin-metathesis catalyst systems, comprising a pincer-ligated iridium-based alkane dehydrogenation catalyst and a molybdenum-based olefin-metathesis catalyst, are reported to effect the metathesis-cyclooligomerization of cyclooctane and cyclodecane to give cycloalkanes with various carbon numbers, predominantly multiples of the substrate carbon number, and polymers.
Cyclooctane Metathesis Catalyzed by Silica-Supported Tungsten Pentamethyl [(SiO)W(Me)<sub>5</sub>]: Distribution of Macrocyclic Alkanes
作者:Nassima Riache、Emmanuel Callens、Manoja K. Samantaray、Najeh M. Kharbatia、Muhammad Atiqullah、Jean-Marie Basset
DOI:10.1002/chem.201403704
日期:2014.11.10
Metathesis of cyclic alkanes catalyzed by the new surface complex [(SiO)W(Me)5] affords a wide distribution of cyclic and macrocyclic alkanes. The major products with the formula CnH2n are the result of either a ringcontraction or ringexpansion of cyclooctane leading to lower unsubstituted cyclic alkanes (5≤n≤7) and to an unprecedented distribution of unsubstituted macrocyclic alkanes (12≤n≤40)