Catalyst-free Reaction of 2-(4H-benzo[d][1,3]oxazin-4-yl)acrylates: Synthesis of 1,2-Dihydroquinolines and 2,3-Dihydropyrroles
Chemical communications(2024)
Abstract
Catalyst-free annulations of 2-(4H-benzo[d][1,3]oxazin-4-yl)acrylates have been successfully achieved under mild conditions. Specifically, the reaction of 2-(4H-benzo[d][1,3]oxazin-4-yl)acrylates with sulfur ylides furnished various 1,2-dihydroquinolines in generally high yields. Furthermore, [3+2]-annulations of 2-(4H-benzo[d][1,3]oxazin-4-yl)acrylates with α,β-unsaturated imines afforded a broad scope of polysubstituted 2,3-dihydropyrroles with high efficiency.
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