An efficient method for the thioalkylation of alkenes via radical desulfitative sulfur‐group transfer is described. The reaction is based on the use of readily available thiosulfonates as starting materials and cheap radical initiators such as dilauroyl peroxide (DLP) and sun lamp irradiation. No transition metal catalyst is required, and the reaction takes place under mild conditions.
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
A simple diamine as ligand in iron-catalyzed regioselective allylic alkylation
作者:Chenguang Yu、Aihua Zhou、Jing He
DOI:10.1039/c2ra21646a
日期:——
A simple and efficient diamine was found to be an efficient ligand for the iron-catalyzedregioselectiveallylicalkylation between various allyl carbonates and nucleophiles, affording excellent yields and good regioselectivity (up to 94% and >20 : 1).
prepared from commercially available starting materials, undergo efficient thermal radical carboaminoxylations onto various nonactivated alkenes to provide 1,4-functionalized malonates B in good to excellent yields. The experiments are very easy to conduct. The carboaminoxylations can be combined with radicalcyclization and fragmentation processes.
Enantioselective Alkoxycyclization of 1,6‐Enynes with Gold(I)‐Cavitands: Total Synthesis of Mafaicheenamine C
作者:Inmaculada Martín‐Torres、Gala Ogalla、Jin‐Ming Yang、Antonia Rinaldi、Antonio M. Echavarren
DOI:10.1002/anie.202017035
日期:2021.4.19
cyclization has been applied for the first totalsynthesis of carbazole alkaloid (+)‐mafaicheenamine C and its enantiomer, establishing its configuration as R. The cavity effect was also evaluated in the cycloisomerization of dienynes. A combination of experiments and theoretical studies demonstrates that the cavity of the gold(I) complexes forces the enynes to adopt constrained conformations, which results