Mild and highly efficient transfer hydrogenation of aldehyde and ketone catalyzed by rubidium phosphate
Mild and highly efficient transfer hydrogenation of aldehyde and ketone catalyzed by rubidium phosphate作者机构：College of Chemistry and Chemical Engineering Hunan University
出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)
年 卷 期：2016年第23卷第7期
页 面：1603-1610页
核心收录：
学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学]
基 金：Project(21576074)supported by the National Natural Science Foundation of China
主 题：rubidium phosphate transfer hydrogenation heterogeneous catalysis cyclic transition state
摘 要：Rubidium phosphate can be more conveniently obtained by extracting trace Rb+ from the salt lake brine. Rb_3PO_4 was found to be an excellent heterogeneous catalyst for transfer hydrogenation. Rb_3PO_4 lost 70% of its active sites after adsorbing water, but the remaining was not affected. The reductions of aldehydes and ketones, when promoted by Rb_3PO_4, were allowed at room temperature. The activities of substrates at room temperature followed a descending order of 2,6-dichlorobenzaldehyde 4-bromobenzaldehydebenzaldehydeacetophenoneanisaldehydebutanone. A new catalytic cycle postulating a six-membered cyclic transition state for the reductions of aldehydes and ketones was proposed. These results exploited the catalytic usage of Rb_3PO_4 and worth in industrial application.
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