A radical based addition–elimination route for the preparation of indoles
作者:John A. Murphy、Karen A. Scott、Rhona S. Sinclair、Concepcion Gonzalez Martin、Alan R. Kennedy、Norman Lewis
DOI:10.1039/b002565h
日期:——
Indoles, including tricyclic derivatives, are produced by cyclisations of aryl radicals onto vinyl halides followed by elimination of halide radical and tautomerism of the resulting product; the aryl radicals are produced using âclean methodologyâ either by reaction of iodide ions with arenediazonium salts or by reaction of phosphorus-centred radicals with aryl iodides.
Bromination of alkenes, alkynes, and aromatic amines has efficiently been carried out at room temperature in short reaction times using potassiumbromide/orthoperiodic acid in dichloromethane-water (1:1) to prepare the corresponding bromo compounds with excellent yields. bromination - orthoperiodic acid - alkenes - aromatic amines
Electrophilic Bromination of Alkenes, Alkynes, and Aromatic Amines with Iodic Acid/Potassium Bromide Under Mild Conditions
作者:Ardeshir Khazaei、Mohammad Ali Zolfigol、Eskandar Kolvari、Nadiya Koukabi、Hamid Soltani、Leyla Sharaf Bayani
DOI:10.1080/00397910903349992
日期:2010.8.31
Bromination of alkenes, alkynes, and aromatic amines has efficiently been carried out at room temperature in short reaction times using HIO3/KBr in CH2Cl2/H2O (1:1) to prepare corresponding brominated compounds in excellent yields.
An efficient bromination of alkenes using cerium(IV) ammonium nitrate (CAN) and potassium bromide
作者:Vijay Nair、Sreeletha B Panicker、Anu Augustine、Tesmol G George、Siji Thomas、M Vairamani
DOI:10.1016/s0040-4020(01)00712-8
日期:2001.8
Bromination of alkenes using a combination of potassium bromide and cerium(iv) ammoniumnitrate (CAN) in a two phase system consisting of water and dichloromethane affords the corresponding dibromides in excellent yield. The reaction most likely involves the addition of the bromine radical generated from bromide ion by CAN and subsequent formation of the dibromide.