在乙酸中用三(2,4-戊二酮基)锰(III)氧化萘以良好至中等产率得到二乙酰甲基衍生物。使用过量的氧化剂,乙酰甲基取代的萘被进一步氧化,得到 3-乙酰氧基-3-萘基-2,4-戊二酮。蒽的类似氧化也产生(二乙酰甲基)蒽以及进一步氧化的二乙酰亚甲基衍生物。发现当芳香族化合物的电离电位低于 8.12 eV 时,这种直接二乙酰甲基化是有效的,并且由三(2,4-戊二酮)锰(III)热解直接产生的二乙酰甲基自由基具有基于取代萘氧化的结果的亲电性。
Manganese(III) or Cobalt(III)-Mediated Oxidative Radical Reactions of Terminal Dienes. One-Pot Synthesis of Bis(dihydrofuran)s
作者:Hiroshi Nishino、Tomoaki Yoshida、Kazu Kurosawa
DOI:10.1246/bcsj.64.1097
日期:1991.4
5-hexadienes with tris(2,4-pentanedionato)-manganese(III) ([Mn(acac)3]) gave α,ω-bis(dihydrofuryl)alkanes (abbreviated bis(dihydrofuran)s, hereafter) in good yields. The reactions with tris(2,4-pentanedionato)cobalt(III) ([Co(acac)3]) instead of [Mn(acac)3] yielded the same bis(dihydrofuran)s quantitatively. The dienes also reacted with ethyl 3-oxobutanoate in the presence of manganese(III) acetate ([Mn(OAc)3])
Formation of 1,2-dioxolanes using Mn(III)-based reaction of various arylacetylenes with 2,4-pentanedione and related reaction
作者:Takuma Tsubusaki、Hiroshi Nishino
DOI:10.1016/j.tet.2009.02.045
日期:2009.5
The manganese(III)-based aerobic oxidation of arylacetylenes with 2,4-pentanedione at ambient temperature unexpectedly gave the 1,2-dioxolane derivatives in moderate yields together with a small amount of the oxiranes. The 1,2-dioxolanes underwent silica gel-assisted contraction to quantitatively give the oxiranes. The reaction pathway for the formation of the 1,2-dioxolanes and the by-product was
Direct Diacetylmethylation of Aromatic Compounds with Tris(2,4-pentanedionato)manganese(III)
作者:Hiroshi Nishino
DOI:10.1246/bcsj.59.1733
日期:1986.6
diacetylmethylene derivatives which were further oxidized. It was found that this direct diacetylmethylation was effective when the ionization potential of the aromatic compound was lower than 8.12 eV, and that the diacetylmethyl radical which was generated directly by the thermolysis of tris(2,4-pentanedionato)manganese(III) has an electrophilic nature based on the result of the oxidation of substituted
在乙酸中用三(2,4-戊二酮基)锰(III)氧化萘以良好至中等产率得到二乙酰甲基衍生物。使用过量的氧化剂,乙酰甲基取代的萘被进一步氧化,得到 3-乙酰氧基-3-萘基-2,4-戊二酮。蒽的类似氧化也产生(二乙酰甲基)蒽以及进一步氧化的二乙酰亚甲基衍生物。发现当芳香族化合物的电离电位低于 8.12 eV 时,这种直接二乙酰甲基化是有效的,并且由三(2,4-戊二酮)锰(III)热解直接产生的二乙酰甲基自由基具有基于取代萘氧化的结果的亲电性。