title: Green synthesis of dipyrromethanes in aqueous media catalyzed by SO3H-functionalized ionic liquid.
abstract: A mild, efficient and metal-free method was described for the green synthesis of dipyrromethanes from aldehydes and unsubstituted pyrrole catalyzed by SO3H-functionalized ionic liquids (SO3H-ILs) in aqueous media at room temperature. Notably, SO3H-ILs, 1-butylsulfonic-3-methylimidazolium hydrogen sulfate ([bsmim][HSO4]) was the most efficient catalyst for moderate to good yields of the corresponding desired products.
authors.affiliation: Department of Chemistry and Center for Innovation in Chemistry, Faculty of Science, Burapha University, Sangsook, Chonburi 20131, Thailand. uthaiwan@buu.ac.th.
authors.forename: W
authors.initials: W
authors.lastname: Senapak
authors.forename: R
authors.initials: R
authors.lastname: Saeeng
authors.forename: J
authors.initials: J
authors.lastname: Jaratjaroonphong
authors.forename: T
authors.initials: T
authors.lastname: Kasemsuk
authors.forename: U
authors.initials: U
authors.lastname: Sirion