Hydrogen Peroxide or Peracetic Acid Mediated Self-Titrating α-Halogenation of 1,3-Dicarbonyl Compounds
作者:Hasim Ibrahim、Ramulu Akula、Marc Galligan
DOI:10.1055/s-0030-1258367
日期:2011.1
Efficient oxidative α-halogenation of 1,3-dicarbonylcompounds has been achieved by employing a system comprising of sub-stoichiometric amounts of TiX4 (X = Cl, Br) in conjunction with environmentally benign hydrogen peroxide (H2O2) or peracetic acid (MeCO3H) as the oxidants. The end point of the reaction is accompanied by a sharp colour change. halogenation - peroxides - titanium - halides - electrophilic
通过使用包含亚化学计量量的TiX 4(X = Cl,Br)以及环境友好的过氧化氢(H 2 O 2)或过氧乙酸的系统,可以实现1,3-二羰基化合物的有效氧化α-卤化酸(MeCO 3 H)作为氧化剂。反应的终点伴随着急剧的颜色变化。 卤化-过氧化物-钛-卤化物-亲电子
Umpolung of halide reactivity: efficient (diacetoxyiodo)benzene-mediated electrophilic α-halogenation of 1,3-dicarbonyl compounds
作者:Ramulu Akula、Marc Galligan、Hasim Ibrahim
DOI:10.1039/b915348a
日期:——
An efficient high-yielding (diacetoxyiodo)benzene-mediated α-halogenation of 1,3-dicarbonyl compounds utilising titanium tetrahalides as the halide source has been developed.
Unified Strategy for Iodine(III)-Mediated Halogenation and Azidation of 1,3-Dicarbonyl Compounds
作者:Marc J. Galligan、Ramulu Akula、Hasim Ibrahim
DOI:10.1021/ol403504z
日期:2014.1.17
A mild and rapid (diacetoxyiodo)benzene-mediated formal electrophilic alpha-azidation of 1,3-dicarbonyl compounds using commercially available Bu4NN3 as the azide source is reported. The reaction conditions employed are based on optimization studies conducted on the analogous halogenations with Et4NX (X = Cl, Br, 1).