Alternative pathways to α,β-unsaturated ketones via direct oxidative coupling transformation using Sr-doped LaCoO 3 perovskite catalyst

• Published in: Royal Society open science Vol. 6; no. 11; p. 191313
• Main Authors: Trinh, Khang H, Doan, Son H, Huynh, Tien V, Tran, Phuong H, Pham, Diep N, Le, Minh-Vien, Nguyen, Tung T, Phan, Nam T S
• Format: Journal Article
• Language: English
• Published: England 01-11-2019
• Subjects: oxidative coupling; catalysis; LaCoO3; αβ-unsaturated ketones; perovskite; alkenes
• ISSN: 2054-5703; 2054-5703
• DOI: 10.1098/rsos.191313

A strontium-doped lanthanum cobaltite perovskite material was prepared, and used as a recyclable and effective heterogeneous catalyst for the direct oxidative coupling of alkenes with aromatic aldehydes to produce α,β-unsaturated ketones. The reaction afforded high yields in the presence of di-
-butylperoxide as oxidant. Single oxides or salts of strontium, lanthanum and cobalt, and the undoped perovskite offered a lower catalytic activity than the strontium-doped perovskite. Benzaldehyde could be replaced by benzyl alcohol, dibenzyl ether, 2-oxo-2-phenylacetaldehyde, 2-bromoacetophenone or (dimethoxymethyl) benzene in the oxidative coupling reaction with alkenes. To our best knowledge, reactions between these starting materials with alkenes are new and unknown in the literature.