A palladium-catalyzed intramolecular amination of alkenes with retention of olefin functionalization was achieved under mild reaction conditions. In the presence of palladium catalyst, the tosyl-protected amine can directly couple with a double bond to provide versatile dihydropyrrole derivatives in moderate to excellent yields.
Synthesis of methacrylic-type peroxidic compounds and study of their homolytic induced decomposition in solution
作者:Daniel Colombani
DOI:10.1016/s0040-4020(96)01180-5
日期:1997.2
unsaturated peroxidic compounds have been prepared, characterized and inductively decomposed in various solvents to afford the corresponding oxiranes. The reaction proceeded by a radical chain mechanism and was initiated either by thermolysis of added t-butyl peracetate at 110°C or AIBN at 80°C, or by autoxidation of BEt3 at 20°C. The studied peroxyderivatives were designed to generate oxyl radicals reacting
Catalytic Cleavage of C(<i>sp</i><sup>2</sup>)–C(<i>sp</i><sup>2</sup>) Bonds with Rh-Carbynoids
作者:Zhaofeng Wang、Liyin Jiang、Pau Sarró、Marcos G. Suero
DOI:10.1021/jacs.9b08632
日期:2019.10.2
We report a catalytic strategy that generates rhodium-carbynoids by selective diazo activation of designed carbyne sources. We found that rhodium-carbynoid species provoke C(sp2)-C(sp2) bond scission in alkenes by inserting a monovalent carbon unit between both sp2-hybridized carbons. This skeletal remodeling process access synthetically useful allyl cation intermediates that conduct to valuable allylic
coworkers1. We wanted to apply this methodology to prepare the peroxide precursors. Thus, we needed to synthesize (2-ethoxycarbonyl prop-2-enyl) phenyl sulfone 1, (2-ethoxycarbonyl but-2-en-1-yl) phenyl sulfone 2 and (3-ethoxycarbonyl but-3-en-2-yl) phenyl sulfone 3. We wish to report the synthesis of such compounds using the advantage of the complexing effect of Polyethyleneoxide 400 (PEO 400) on alkali