Synthesis of spirobiindanes via bis-cyclization reaction of the 1,5-diaryl-3-pentanones catalyzed by heteropoly acids
作者:Kun Lan、Zixin Shan、Shao Fan
DOI:10.1016/j.tetlet.2006.04.115
日期:2006.6
Bis-cyclization reaction of the 1,5-diaryl-3-pentanones catalyzed by heteropoly acids (HPAs) was examined for the first time, and a series of spirobiindanes were synthesized. 1,5-Diaryl-3-pentanones were refluxed and dehydrated in toluene in the presence of 0.15 equiv of a heteropoly acid to furnish spirobiindanes in moderate to high yield. For the known 4,4'-dibromo7,7'-dimethoxy-1,1'-spirobiindane, the yield was upgraded from 66% to 80%. (c) 2006 Elsevier Ltd. All rights reserved.