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Heterocyclic Aromatic Amide Protecting Groups for Aryl and Phthalocyaninesulfonic Acids
(Canadian Journal of Chemistry, NRC Research Press, 1999)
Pyrroles, indole, imidazole, and a pyrazole were treated with 3,4-dibromobenzenesulfonyl chloride to form 3,4-dibromobenzenesulfonamides. The 1-(3,4-dibromophenylsulfonyl)pyrrole and 1-(3,4-dibromophenylsulfonyl)indole ...