131287-24-6Relevant articles and documents
SULFONYL DERIVATIVES OF 2,5-DIPHENYLFURAZAN
Cremlyn, Richard J.,Sheppard, Richard,Swinbourne, Frederick J.
, p. 117 - 121 (2007/10/02)
2,5-Diphenylfurazan (2) was converted into the monosulfonyl chlorides (3a, 3b) on treatment with chlorosulfonic acid (ca. 7 moles).These products were identified by reaction with secondary amines when both 3'- and 4'-sulfonyl derivatives were isolated.Under more forcing conditions, using a much larger excess of the reagent (ca. 25 moles), bis-substition was achieved.Although TLC indicated the formation of two products, after reaction with secondary amines only 3',3''-disulfonyl derivatives could be isolated.These results are discussed in electronic terms.
