Silica and zirconia supported olefin metathesis pre-catalysts: Synthesis, catalytic activity and multiple-use in dimethyl carbonate
作者:Adel Keraani、Cédric Fischmeister、Thierry Renouard、Marie Le Floch、Amandine Baudry、Christian Bruneau、Murielle Rabiller-Baudry
DOI:10.1016/j.molcata.2012.01.022
日期:2012.5
This study is aimed at designing and synthesising new olefin metathesis catalysts grafted onto porous solid supports and using them in dimethyl carbonate (DMC) an eco-friendly solvent. Two hybrid organic-inorganic Hoveyda-type catalysts were prepared in a few steps by initial grafting of a tailor-made ligand by sol-gel process onto porous silica and zirconia.The new hybrid organic-inorganic catalysts were then engaged in a series of model ring closing metathesis reactions (RCM) in the eco-friendly solvent DMC and their multiple-use was studied. (C) 2012 Elsevier B.V. All rights reserved.
Total synthesis of floresolide B and Δ6,7-Z-floresolide B
作者:K. C. Nicolaou、Hao Xu
DOI:10.1039/b517385j
日期:——
The total syntheses of the cytotoxin marine natural product floresolide B (1) and its Î6,7-Z isomer (2) have been achieved through an olefin metathesis-based strategy.