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Oxidative rearrangement of alkenes using in situ generated hypervalent iodine(III)
Authors:Anees Ahmad  Paulo Scarassati  Nazli Jalalian  Berit Olofsson  Luiz F. Silva Jr.
Affiliation:1. Instituto de Química—Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, CP 26077, CEP 05513-970 São Paulo, SP, Brazil;2. Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
Abstract:A novel protocol for the oxidative rearrangement of alkenes using in situ generated hypervalent iodine(III) was developed. This approach uses inexpensive, readily available, and stable chemicals (PhI, mCPBA, and TsOH) giving rearrangement products in yields comparable to those obtained using the more expensive commercially available [hydroxy(tosyloxy)iodo]benzene [HTIB or Koser’s reagent]. Additionally, an alternative protocol for the synthesis of 1-methyl-2-tetralone through the one-step epoxidation/rearrangement of 4-methyl-1,2-dihydronaphthalene using mCPBA and TsOH was developed.
Keywords:Rearrangement   Hypervalent iodine   Ring contraction   Oxidation   Alkenes
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