135489-52-0Relevant academic research and scientific papers
A CONVENIENT PREPARATION OF STERICALLY CROWDED 1,9-DISUBSTITUTED DIBENZOTHIOPHENES AND 3,3'-DISUBSTITUTED DIARYL SULFIDES
Furukawa, Naomichi,Kimura, Takeshi,Horie, Yoji,Ogawa, Satoshi
, p. 675 - 678 (2007/10/02)
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.
