gels are prepared by treatment of polymethylhydrosiloxane with diols in the presence of (mu(3),eta(2),eta(3),eta(5)-acenaphthylene)Ru(3)(CO)(7), and act as reusable catalysts in the isomerization of alkenes without leakage of the catalyst species.
Iron-Mediated Radical Nitro-Cyclization Reaction of 1,6-Dienes
作者:Tsuyoshi Taniguchi、Hiroyuki Ishibashi
DOI:10.1021/ol902510p
日期:2010.1.1
involved radical addition of a nitro group to 1,6-dienes promoted by the thermal decomposition of iron nitrate(III) nonahydrate, cyclization, and trapping of the resulting terminal radicals by a chlorine atom in the presence of chloride salt afforded five-membered-ring compounds. The present reaction provides a practical method for the synthesis of nitro compounds due to its simple experimental procedure
Metal‐free Photocatalytic Intermolecular anti‐Markovnikov Hydroamination of Unactivated Alkenes
作者:Gaoyuan Zhao、Juncheng Li、Ting Wang
DOI:10.1002/ejoc.202100049
日期:2021.5.14
A metal‐free intermolecularhydroamination reaction induced by visible light was developed. These reactions show great generality of a variety of N‐radicals and alkenes, providing direct access to various masked amines. The radical strategy provides excellent anti‐Markovnikov selectivity and regioselectivity in diene substrates.
conversion of allyl homoallyl ethers to gamma,delta-unsaturated carbonylcompounds. For example, treatment of 1-allyl-1-allyloxycyclohexane in the presence of catalytic amounts of [Ir(cod)Cl](2), PCy(3), and Cs(2)CO(3) in toluene at 100 degrees C afforded 4-cyclohexyliden-2, 3-dimethylbutanal in 74% yield. The reaction presumably proceeds through double bond migration to allyl vinyl ethers, which then
Cyclisation of dienes using phosphorus-centred radicals to form organophosphorus adducts
作者:Christopher M. Jessop、Andrew F. Parsons、Anne Routledge、Derek Irvine
DOI:10.1016/s0040-4039(02)02610-2
日期:2003.1
Reaction of various dienes with phosphites or related phosphorus hydrides, under free radical cyclisation conditions, affords cyclic organophosphorus adducts. This quick, mild and technically clean approach affords 5- and 6-ring carbocycles and heterocycles in good to excellent yield.