2024-10-16
Cobalt(II) catalyzed Michael-type hydroamination of activated olefins
2024-10-16 • Rajesh Rajagopal, Joseph Prince Devassy, Rasheed Nihala, K. Rajesh
The aza-Michael addition reaction of primary and secondary amines to <i>α</i>,<i>β</i>-unsaturated olefins viz; acrylonitrile, phenyl vinyl sulfone and dimethyl maleate has been carried out using 5–10 mol% Co(NO<sub>3</sub>)<sub>2</sub>.6H<sub>2</sub>O as a catalyst in <i>t</i>-BuOMe at 80–100 °C, giving rise to the desired <i>β</i>-aminocarbonyl compounds or sulfones in moderate to good yields. A wide range of aromatic amines, even those bearing electron withdrawing groups could be added to activated olefins via …