Hg(OTf)2 Catalyzed Intramolecular 1,4-Addition of Donor–Acceptor Cyclopropenes to Arenes

A Hg­(OTf)2 catalyzed intramolecular arene 1,4-addition reaction of N-benzyl donor–acceptor cyclo­propene­carbox­amides was developed to synthesize a series of [3.2.2]­nona­triene derivatives. This novel reaction is also observed with silver­(I) catalysts known to form metal carbene intermediates in competition with the Buchner reaction.本研究开发了三氟甲磺酸汞(II) (Hg(OTf)2) 催化的N-苄基给体-受体环丙烯甲酰胺分子内芳烃1,4-加成反应，用以合成一系列[3.2.2]壬三烯衍生物。该新型反应在银(I)催化剂作用下同样可实现，而这类银(I)催化剂已知可通过与布赫纳反应（Buchner reaction）竞争的路径生成金属卡宾中间体。