期刊
MOLECULAR CATALYSIS
卷 504, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.mcat.2021.111499
关键词
OMS-2 based nanocomposites; Heterogeneous catalysis; One-pot synthesis; Quinazolines; Oxidation
资金
- National Natural Science Foundation of China [21403256, 21573261, 21805166]
- Youth Innovation Promotion Association CAS [2018456]
- LICP Cooperation Foundation for Young Scholars [HZJJ2010]
- 111 Project [D20015]
- Engineering Research Center of Ecoenvironment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University [KF201905]
- outstanding young and middleaged science and technology innovation teams, Ministry of Education, Hubei province, China [T2020004]
A series of sodium phosphotungstate modified manganese oxide octahedral molecular sieve catalysts were developed and shown to exhibit excellent catalytic activity and selectivity in the one-pot synthesis of quinazolines. The successful doping of tungsten ions into the OMS-2 framework and the synergistic effect of phosphotungstic acid and OMS-2 were believed to contribute to the superior performance. This research provides a new environmentally-friendly solution for synthesizing heterocyclic compounds.
In this work, a series of sodium phosphotungstate modified manganese oxide octahedral molecular sieve (OMS-2) catalysts ([PW]-OMS-2) were developed, and their catalytic activities were investigated by one-pot synthesis of quinazolines from benzyl alcohol and 2-aminobenzylamine with O-2 as green oxidant in dimethyl carbonate (DMC). TEM, XRD and EDS confirmed that sodium phosphotungstate decomposed into phosphotungstic acid and sodium tungstate in the doping process. Meanwhile, phosphotungstic acid attached and located at the surface of OMS-2 and W ions were successfully doped into the OMS-2 framework. For comparison, phosphotungstic acid/ OMS-2 was prepared by simple wet impregnation method. The [PW]-OMS-2 is the most highly selective and effective over than phosphotungstic acid/OMS-2 and OMS-2 itself in the one-pot synthesis of quinazolines. It may be due to the synergetic effect of phosphotungstic acid and OMS-2, and successfully doping W into OMS-2 frameworks. Hence, this work provides a new environmentally-friendly and heterogeneous OMS-2 based nanocomposites and it may be put into practice to synthesize heterocyclic compounds.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据