Direct Access to 1,4-Dihydroxyanthraquinones: The Hauser Annulation Reexamined with <i>p</i>-Quinones
作者:Dipakranjan Mal、Sutapa Ray、Indrajeet Sharma
DOI:10.1021/jo062271j
日期:2007.6.1
3-Phenylsulfanylphthalides (e.g. 8a) readily react with p-benzoquinones in the presence of (LiOBu)-Bu-t in THF to furnish 1,4-dihydroxyanthraquinones in good yields and one-pot operations.