66595-79-7Relevant academic research and scientific papers
Novel and potent Lewis acid catalyst: Br2-catalyzed Friedel-Crafts reactions of naphthols with aldehydes
Liang, Deqiang,Li, Jingjing,Li, Yanni,Wang, Baoling,Cheng, Ping,Luo, Sha
supporting information, p. 379 - 385 (2016/03/23)
A discovery that the inexpensive Br2 can serve as a potent Lewis acid catalyst for bis(2-hydroxy-1-naphthyl)methanes synthesis is presented. Under the catalysis of Br2 at room temperature, naphthols reacted smoothly with various aldehydes with high efficiency and broad substrate scope. This reaction used to require highly acidic conditions and/or high temperature and/or pressure, and sometimes featured poor yields. Moreover, theoretical calculations suggested that Br2 is a potent Lewis acid to activate the carbonyl group, yet it was not the primary cause for the remarkable activity of Br2 in the current communication.
Ionic Liquid [DABCO-H][HSO4] as a Highly Efficient and Recyclable Catalyst for Friedel-Crafts Alkylation in the Synthesis of Bis(naphthol)methane and Bis(indolyl)methane Derivatives
Tong, Jun,Yang, Cheng,Xu
, p. 3559 - 3566 (2016/10/17)
A simple and highly efficient approach to the synthesis of bis(naphthol)methane (BNM) and bis(indolyl)methane (BIM) derivatives has been developed. In the presence of 1,4-diazabicyclo[2.2.2]octane (DABCO)-based ionic liquid catalysts, which are environmental friendly, inexpensive, and recyclable, the reaction afforded the corresponding products in good to excellent yields within short times under solvent-free conditions. The catalysts can be easily recovered and reused several times without significant loss in activity.
1,3-Dibromo-5,5-dimethylhydantoin (DBH)/kaolin: An efficient reagent system for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes under solvent-free conditions
Shirini, Farhad,Khaligh, Nader Ghaffari,Ghasem-Abadi, Parisa Ghods,Imanzadeh, Gholam Hossein
, p. 1145 - 1148,4 (2020/07/31)
1,3-Dibromo-5,5-dimethylhydantoin, has been used as an efficient catalyst for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes in the presence of kaolin. All reactions are performed in the absence of solvent in relatively short reaction times in good to
