(E)-N-(3-aminoprop-1-enyl)sulfonamides. Density Functional Theory (DFT) studies allow interpreting the key role of unsaturated substituents on nitrogen as ancillary coordinating moieties for the copper catalyst. A copper-catalysed hydroamination reaction of N-allenylsulfonamides with amines has been developed through a rational approach based on mechanistic studies. The reaction is promoted by a simple copper(I) catalyst
A two-directional strategy for the diversity-oriented synthesis of macrocyclic scaffolds
作者:Kieron M. G. O'Connell、Henning S. G. Beckmann、Luca Laraia、Helen T. Horsley、Andreas Bender、Ashok R. Venkitaraman、David R. Spring
DOI:10.1039/c2ob26272j
日期:——
development of a highly step-efficient strategy for the diversity-orientedsynthesis of complex macrocyclic architectures, using a modular approach based on the two-directional synthesis of bifunctional linear precursors and their subsequent combination in a two-directional macrocyclisation process. In this proof of principle study, the synthesis of 14 such compounds was achieved. Cheminformatic analysis
3]-sigmatropic rearrangement of quaternary allylic ammonium ylides via in situ activation of tertiary allylicamines with arynes under mild conditions. Using 2-(trimethylsilyl)aryl triflates as aryne precursors, a range of tertiary allylicamines bearing electron-withdrawing groups underwent [2,3]-sigmatropic rearrangement to furnish structurally diverse homoallylic amines in moderate to good yields. The reaction
A Dicationic Ruthenium Alkylidene Complex for Continuous Biphasic Metathesis Using Monolith-Supported Ionic Liquids
作者:Benjamin Autenrieth、Wolfgang Frey、Michael R. Buchmeiser
DOI:10.1002/chem.201201199
日期:2012.10.29
ruthenium–alkylidene complex [Ru(dmf)3(IMesH2)(CH‐2‐(2‐PrO)‐C6H4)][(BF4)2] (1; IMesH2=1,3‐dimesitylimidazolin‐2‐ylidene) has been prepared and used in continuous metathesis reactions by exploiting supported ionic‐liquid phase (SILP) technology. For these purposes, ring‐opening metathesispolymerization (ROMP)‐derived monoliths were prepared from norborn‐2‐ene, tris(norborn‐5‐ene‐2‐ylmethyloxy)methylsilane