芳基碘化物与活化的次甲基化合物乙酰氨基丙二酸二乙酯的反应可以在 CuI 和 NaH 的 DMSO 中有效进行,得到乙酰氨基(芳基)丙二酸二乙酯,其可能是 α-芳基甘氨酸的有用前体,收率良好。尽管与另一种次甲基底物 2-氰基丙酸乙酯的反应也提供了预期的偶联产物,但在甲基丙二酸二乙酯、芳烃以及正在形成的酯的氧化偶联化合物的情况下没有获得取代产物。
Studies on fluoroalkylation and fluoroalkoxylation. Part 10. Electron-transfer induced reactions of perfluoroalkyl iodides and the dialkyl malonate anion and β-fragmentation of the halotetrafluoroethyl radical
作者:Qing-Yun Chen、Zai-Ming Qiu
DOI:10.1016/s0022-1139(00)81433-5
日期:1986.4
malonic ester anion () in DMF to give (), 1-hydroperfluoroalkane () and dimer of the anion (). The reaction is accelerated by UV irradiation and partly suppressed by p-DNB. Diallyl ether (DAE) can trap the radical intermediates to afford five-membered ring products. Interestingly, in the case of ( X = Cl, I ) the same reaction mainly yielded tetrafluoroethylene and instead of and . The radical intermediate
Iron (III) salts (perchlorate and nitrate nonahydrate) in acetonitrile or acetic anhydride at 0–50°C oxidize the ∝-position of malonic esters efficiently via the corresponding radicals. In the presence of olefins and aromatics, inter- and intramolecular free radical chain or oxidative additions are observed.
Lithium Malonate Enolates as Precursors for Radical Reactions − Convenient Induction of Radical Cyclizations with either Radical or Cationic Termination
作者:Ullrich Jahn、Philip Hartmann、Ina Dix、Peter G. Jones