Presentation Information
[1D05]Design of acid–base cooperative solid catalysts by combining basic metal oxide clusters and metal cations
○Soichi Kikkawa1, Shoji Fukuda1, Cristy Varghese1, Kentaro Yonesato2, Kosuke Suzuki2, Hideyuki Kawasoko1, Tatsuya Higaki1, Kazuya Yamaguchi2, Seiji Yamazoe1 (1. Tokyo Metropolitan University, 2. The University of Tokyo)
Keywords:
metal oxide cluster,Ag cation,base catalysis
Metal oxide clusters composed of group V metals such as Nb and Ta are active for proton abstraction and CO2 activation because of their base catalysis. It is known that the synthesis of cyclic carbonates by CO2 insertion into terminal alkynes are catalyzed by Ag cations in the presence of base. In this study, we found that Ag cation salts of basic metal oxide cluster anions exhibit high yields in the synthesis of cyclic carbonates by CO2 insertion into propargylic alcohols in the presence of homogeneous metal oxide clusters as external bases, at room temperature and atmospheric pressure.