title: Preparation of 3-azoindoles and 3-hydrazonoindolin-2-imines as well as their applications as NNO pincer ligands for boron.
abstract: Potassium carbonate-promoted coupling reactions between 3-diazoindolin-2-imines and nucleophiles were tested. By respectively applying 2-naphthalenols and 2-arylacetates as nucleophiles, 3-azoindoles and 3-hydrazonoindolin-2-imines were obtained in excellent yields. Moreover, 3-azoindol-2-amines could be used as NNO pincer ligands for boron and resulted in the formation of hexacycleborofluorides with their absorption around 580 nm in dichloromethane.
authors.affiliation: Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China.. pinglu@zju.edu.cn orgwyg@zju.edu.cn.
authors.forename: Hualong
authors.initials: H
authors.lastname: Ding
authors.forename: Zhixing
authors.initials: Z
authors.lastname: Peng
authors.forename: Jinjin
authors.initials: J
authors.lastname: Wang
authors.forename: Ping
authors.initials: P
authors.lastname: Lu
authors.forename: Yanguang
authors.initials: Y
authors.lastname: Wang