Metal-Free Three-Component Oxyalkynylation of Alkenes
作者:Yangshan Li、Ran Lu、Shutao Sun、Lei Liu
DOI:10.1021/acs.orglett.8b02954
日期:2018.11.2
An unprecedented (NH4)2S2O8 mediated metal-free three-componentalkene oxyalkynylation using H2O or alcohol as oxygenation agent is described. Mechanistic studies suggested that the reversed regioselectivity should be dictated by an alkene radical cation intermediate.
描述了前所未有的(NH 4)2 S 2 O 8介导的使用H 2 O或醇作为氧化剂的无金属三组分链烯氧基炔基化反应。机理研究表明,逆向的区域选择性应由烯烃自由基阳离子中间体决定。
Photo-oxidation of alcohols by hexachlorometalate(IV) ions (M = Pt, Pd, or Ir): spin trapping and matrix isolation electron spin resonance studies
作者:Anand G. Fadnis、Terence J. Kemp
DOI:10.1039/dt9890001237
日期:——
Spin-trapping studies reveal that whereas the mild (λ > 380 nm) photolysis of ions [MCl6]2–(M = Pd, Pt, or Ir) in alcohol (RCH2OH)-water mixtures leads invariably to RĊHOH, in pure alcoholic media many of the oxidations lead to RCH2[graphic omitted]. Prolonged, wide-band photolysis leads to the production of H atoms. At 77 K, wide-band photolysis leads to the production of platinum(III) and palladium(III)