AbstractVisible light‐mediated decarboxylation using N‐acyloxyphthalimides as the source for carbon‐centered radicals was applied for the synthesis of spirobutenolides. The utility of this approach is demonstrated with the formal synthesis of (S)‐(+)‐lycoperdic acid. Alternatively, 2,3‐anellated furans can be obtained in a one‐pot procedure via photocyclization following a regioselective semipinacol rearrangement.magnified image
AbstractVisible light‐mediated decarboxylation using N‐acyloxyphthalimides as the source for carbon‐centered radicals was applied for the synthesis of spirobutenolides. The utility of this approach is demonstrated with the formal synthesis of (S)‐(+)‐lycoperdic acid. Alternatively, 2,3‐anellated furans can be obtained in a one‐pot procedure via photocyclization following a regioselective semipinacol rearrangement.magnified image
Uncatalyzed, green aza-Michael addition of amines to dimethyl maleate
作者:Giovanna Bosica、Anthony John Debono
DOI:10.1016/j.tet.2014.06.124
日期:2014.9
Dimethylmaleate was found to be a very reactive and selective acceptor for the aza-Michael addition in comparison to other commonly used electron-deficient alkenes. It reacts efficiently with a variety of aliphatic amines in complete absence of any catalyst and solvent at room temperature. Under these environmentally-friendly conditions, high yields of selectively mono-adducts were obtained within