A Convenient Preparation of Sterically Crowded 1,9-Disubstituted Dibenzothiophenes and 3,3'-Disubstituted Diaryl Sulfides
作者:Naomichi Furukawa、Takeshi Kimura、Yoji Horie、Satoshi Ogawa
DOI:10.3987/com-91-5683
日期:——
Thianthrene-5-oxide (1) reacted with 2.2 equivalents of lithium diisopropylamide to give 4,6-dilithiated 1 which was converted to 4,6-disubstituted thianthrene-5-oxides (3). 3 afforded sterically crowded 1,9-disubstituted dibenzothiophenes (4) in moderate yields on treatment with n-butyllithium or phenyllithium.