Silica-supported policresulen as a solid acid catalyst for organic reactions
作者:Kexing Zeng、Zhipeng Huang、Jie Yang、Yanlong Gu
DOI:10.1016/s1872-2067(15)60910-x
日期:2015.9
A new type of solid catalyst was prepared by coating a thin layer of policresulen, an inexpensive polymer prepared via condensation of 2-hydroxy-4-methylbenzenesulfonic acid and formaldehyde that has been used as commercially available drug, onto the surface of silica. The policresulen component is insoluble in many organic solvents and can be adsorbed on silica with the aid of hydrogen bonding. The obtained silica/policresulen composite showed remarkable catalytic activity for various organic reactions. In model reactions, the catalyst can be recycled several times without significant loss of activity. The salient features of using this acid catalyst in organic reactions include cost-effectiveness, simple and time-efficient preparation, and the convenience of controlling the acid loading on the solid. (C) 2015, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
Design and development of 2,3-benzodiazepine (CFM) noncompetitive AMPA receptor antagonists
作者:Rosaria Gitto、Maria Zappalà、Giovambattista De Sarro、Alba Chimirri
DOI:10.1016/s0014-827x(01)01186-7
日期:2002.2
2,3-Benzodiazepines represent a class of heterocyclic compounds that interact with AMPA-type glutamate receptors in a noncompetitive manner. These compounds have attracted great interest for their pharmacological effects against acute and chronic neurodegenerative diseases, such as ischemia and epilepsy. We synthesized a large number of 2,3-benzodiazepine derivatives, which showed anticonvulsant properties in different seizure models and a noncompetitive blockade of AMPA receptor. This article will briefly mention our work in this field and the main SAR considerations. (C) 2002 Editions scientifiques et medicales Elsevier SAS. All rights reserved.