Asymmetric Reduction of Cyclic Enones to Allylic Alcohols
作者:Jérôme Hannedouche、Jennifer A. Kenny、Tim Walsgrove、Martin Wills
DOI:10.1055/s-2002-19747
日期:——
Asymmetric transfer hydrogenation of cyclic enones results in highly enantioselective reduction to cyclic allylic alcohols.
环状烯酮的不对称转移加氢反应可高度对映选择性地还原成环状烯丙基醇。
Oxidative addition of azide anion to triisopropylsilyl enol ethers: Synthesis of α-azido ketones and 2-amino(methoxycarbonyl)alk-2-en-1-ones
作者:Philip Magnus、Lisa Barth
DOI:10.1016/0040-4020(95)00681-w
日期:1995.10
Treatment of triisopropylsilyl enol ethers with eerie ammonium nitrate/sodium azide at -20 degrees C in acetonitrile gives alpha-azido ketones in average to good yields (50-80%). Subsequent conversion of the alpha-azido ketones into 2-amino(methoxycarbonyl)cycloalk-2-en-1-ones is described.
Asymmetric transfer hydrogenation of α,β-unsaturated, α-tosyloxy and α-substituted ketones
作者:Philip Peach、David J. Cross、Jennifer A. Kenny、Inderjit Mann、Ian Houson、Lynne Campbell、Tim Walsgrove、Martin Wills
DOI:10.1016/j.tet.2005.11.036
日期:2006.2
Asymmetric transferhydrogenation of cyclic and acyclic α,β-unsaturatedketones catalysed by η6-p-cymene/ruthenium(II) and η5-pentamethylcyclopentadienyl/rhodium(III) complexes have been investigated. Cyclicα,β-unsaturatedketones appeared to be more suitable substrates for the synthesis of enantiomerically pure allylic alcohols than do acyclic α,β-unsaturatedketones. A proposed mechanism for the
环状和无环α的不对称转移氢化,β不饱和酮由η催化6 - p -cymene /钌(II)和η 5 -五甲基/铑(III)络合物进行了研究。环状α,β-不饱和酮似乎比无环α,β-不饱和酮更适合用于合成对映体纯的烯丙基醇。讨论了一种由α-甲苯磺酰氧基和卤素取代的苯乙酮形成4-苯基-[1,3]-二氧戊环-2-酮的机理。提出了进一步研究减少α-甲苯磺酰氧基苯乙酮范围和α-取代酮的动态动力学拆分的结果。