Biradicals from Benzoenyne−Allenes. Application in the Synthesis of 11<i>H</i>-Benzo[<i>b</i>]fluoren-11-ols, 1<i>H</i>-Cyclobut[<i>a</i>]indenes, and Related Compounds
作者:Hongbin Li、Hai-Ren Zhang、Jeffrey L. Petersen、Kung K. Wang
DOI:10.1021/jo0104577
日期:2001.10.1
New synthetic pathways to 11H-benzo[b]fluoren-11-ols, 1H-cyclobut[a]indenes, and related compounds via biradicals generated from benzoenyne-allenes were developed. Treatment of the diacetylenic propargylic alcohols 13, derived from condensation between benzophenones and the lithium acetylide of 1-(2-ethynylphenyl)-2-phenylethyne, with thionyl chloride produced the 11-chloro-11H-benzo[b]fluorene 14