New selectivities from old catalysts. Occlusion of Grubbs’ catalysts in PDMS to change their reactions
作者:M. Brett Runge、Martin T. Mwangi、Ned B. Bowden
DOI:10.1016/j.jorganchem.2006.09.022
日期:2006.12
dissolved in methylene chloride also react by olefin isomerization with occluded catalysts. Eleven examples of substrates that exhibit dual reactivity by undergoing olefin isomerization with occluded catalysts and olefin metathesis with catalysts dissolved in methylene chloride are reported. Most of these substrates have olefins with allylic phosphine oxides, carbonyls, or ethers. Control experiments demonstrate
Efficient Allyl to Propenyl Isomerization in Functionally Diverse Compounds with a Thermally Modified Grubbs Second-Generation Catalyst
作者:Stephen Hanessian、Simon Giroux、Andreas Larsson
DOI:10.1021/ol062167o
日期:2006.11.1
Heating compounds containing C-allylic appendages in MeOH in the presence of 10 mol % of Grubbs second-generation catalyst at 0.075 M substrate concentration leads to the corresponding 2-propenyl derivatives without further conjugation in the cases of ketones, esters, and lactams. The reaction is applicable to a large variety of functionally relevant terminal olefins, including O- and N-allyl ethers