Rearrangement of Annelated Housanes to Triquinane-Like Hydrocarbons by Electron Transfer (1,3-Cyclopentanediyl Radical Cations) and Acid Catalysis (Cyclopentyl Carbenium Ions)
作者:Waldemar Adam、Christian P. Librera
DOI:10.1021/jo016224x
日期:2002.1.1
The electron-transfer-catalyzed rearrangement of the annelated housane 4a on treatment with tris(p-bromophenyl)aminium hexachloroantimonate (TBA(*)(+)SbCl(6)(-)) affords regioselectively the two isomeric olefins endo-5a and 6a by 1,2 migration of the two groups at the methano bridge. Acid-catalyzed rearrangement gives in addition to endo 5a and 6a also the regioisomer endo-7a as major product. The