作者:Toshifumi Dohi、Teruyoshi Uchiyama、Daisuke Yamashita、Naohiko Washimi、Yasuyuki Kita
DOI:10.1016/j.tetlet.2010.12.037
日期:2011.4
The excellent oxidizing behavior of the mu-oxo-bridged phenyliodine trifluoroacetate 1 is revealed during the phenolic oxidations mediated by hypervalent iodine(III) reagents. The use of the mu-oxo-bridged compound 1 instead of PhI(OAc)(2) (PIDA) and PhI(OCOCF3)(2) (PIFA) during the oxidative cyclization of phenols involving carbon-oxygen, carbon-nitrogen, and carbon-carbon bond formations could produce spirocyclized cyclohexadienones in comparable or somewhat better yields. Thus, we have concluded that the unique reagent 1 is a promising alternative to PIDA and PIFA, and the use of reagent 1 as a reasonable choice is recommended for the hypervalent iodine(III)-mediated phenolic oxidations as well as other transformations. (C) 2010 Elsevier Ltd. All rights reserved.