High-Productivity Single-Pass Electrochemical Birch Reduction of Naphthalenes in a Continuous Flow Electrochemical Taylor Vortex Reactor.
High-Productivity Single-Pass Electrochemical Birch Reduction of Naphthalenes in a Continuous Flow Electrochemical Taylor Vortex Reactor.
复制标题
DOI:
10.1021/acs.oprd.2c00108
复制
发表时间:
2022-09-16
影响因子:
3.4
通讯作者:
George, Michael W.
中科院分区:
文献类型:
--
作者:
Lee, Darren S.;Love, Ashley;Mansouri, Zakaria;Clarke, Toby H. Waldron;Harrowven, David C.;Jefferson-Loveday, Richard;Pickering, Stephen J.;Poliakoff, Martyn;George, Michael W.
关键词:
We report the development of a single-pass electrochemical Birch reduction carried out in a small footprint electrochemical Taylor vortex reactor with projected productivities of >80 g day–1 (based on 32.2 mmol h–1), using a modified version of our previously reported reactor [Org. Process Res. Dev.2021, 25, 7, 1619–1627], consisting of a static outer electrode and a rapidly rotating cylindrical inner electrode. In this study, we used an aluminum tube as the sacrificial outer electrode and stainless steel as the rotating inner electrode. We have established the viability of using a sacrificial aluminum anode for the electrochemical reduction of naphthalene, and by varying the current, we can switch between high selectivity (>90%) for either the single ring reduction or double ring reduction with >80 g day–1 projected productivity for either product. The concentration of LiBr in solution changes the fluid dynamics of the reaction mixture investigated by computational fluid dynamics, and this affects equilibration time, monitored using Fourier transform infrared spectroscopy. We show that the concentrations of electrolyte (LiBr) and proton source (dimethylurea) can be reduced while maintaining high reaction efficiency. We also report the reduction of 1-aminonaphthalene, which has been used as a precursor to the API Ropinirole. We find that our methodology produces the corresponding dihydronaphthalene with excellent selectivity and 88% isolated yield in an uninterrupted run of >8 h with a projected productivity of >100 g day–1.
登录
查看更多内容
DOI:
10.1039/jr9440000430
发表时间:
1944-01-01
期刊:
JOURNAL OF THE CHEMICAL SOCIETY
影响因子:
--
作者:
Birch, AJ
通讯作者:
Birch, AJ
影响因子:
12.9
作者:
Han, Xiao-Qing;Wang, Lei;Jia, Yi-Xia
通讯作者:
Jia, Yi-Xia
影响因子:
3.9
作者:
Kabeshov, Mikhail A.;Musio, Biagia;Ley, Steven V.
通讯作者:
Ley, Steven V.
影响因子:
15
作者:
Cole JP;Chen DF;Kudisch M;Pearson RM;Lim CH;Miyake GM
通讯作者:
Miyake GM
影响因子:
4.2
作者:
Cox, Brian;Zdorichenko, Victor;Bloomfield, Graham
通讯作者:
Bloomfield, Graham