A facile and efficient synthesis of substituted dihydropyridone–BF2 complexes is developed via intramolecularcyclization of α-acyl acrylamides and α-acyl cinnamamides mediated by BF3·Et2O.
A facile and efficient synthesis of substituted indeno[2,1-c]quinolin-6(7H)-ones from a variety of α-acyl N-arylcinnamamides mediated by polyphosphoric acid (PPA) is described, and a mechanism involving the formation of a dicationic superelectrophile and subsequent double intramolecular nucleophilic cyclization reactions is proposed.
描述了一种由多磷酸(PPA)介导的多种α-酰基N-芳基肉桂酰胺轻松高效地合成取代茚并[2,1 - c ]喹啉-6(7 H)-的方法,其中涉及到形成机理提出了一种超亲电性和随后的双重分子内亲核环化反应的方法。
Copper-Nitrene Triggered Annulation of α-Acyl Cinnamides: Access to Isoxazol-3(2<i>H</i>
)-ones
A facile and efficient one‐potsynthesis of isoxazol‐3(2H)‐ones has been developed starting fromα‐acyl cinnamides and tosyliminophenyliodinane catalyzed by copper(II) acetate [Cu(OAc)2] under very mild conditions involving a tandem aza‐Michael addition and intramolecular cyclization sequence.