title: An efficient and practical synthesis of bis(indolyl)methanes catalyzed by aminosulfonic acid under ultrasound.
abstract: Synthesis of bis(indolyl)methanes via electrophilic substitution reactions of indoles with aromatic aldehydes and ketones catalyzed by aminosulfonic acid was carried out in 23-96% yield at 30-38 degrees C in EtOH aqueous solution under ultrasound irradiation.
authors.affiliation: College of Chemistry and Environmental Science, Hebei University, Key Laboratory of Analytical Science and Technology of Hebei Province, Baoding 071002, PR China. orgsyn@mail.hbu.edu.cn
authors.forename: Ji-Tai
authors.initials: JT
authors.lastname: Li
authors.forename: Hong-Guang
authors.initials: HG
authors.lastname: Dai
authors.forename: Wen-Zhi
authors.initials: WZ
authors.lastname: Xu
authors.forename: Tong-Shuang
authors.initials: TS
authors.lastname: Li
mesh_terms: D002384:Catalysis; D007211:Indoles / Q000737:chemistry* / Q000528:radiation effects; D008697:Methane / Q000737:chemistry* / Q000528:radiation effects; D013010:Sonication; D013451:Sulfonic Acids / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D007211:Indoles; D013451:Sulfonic Acids; C005741:sulfamic acid; D008697:Methane