Substitution-Controlled Selective Formation of Hexahydrobenz[<i>e</i>]isoindoles and 3-Benzazepines via In(OTf)<sub>3</sub>-Catalyzed Tandem Annulations
作者:Siyang Xing、Nan Gu、Xin Wang、Jingyi Liu、Chunyan Xing、Kui Wang、Bolin Zhu
DOI:10.1021/acs.orglett.8b02406
日期:2018.9.21
When the N-substituent was a 4-methylbenzenesulfonyl group (Ts), sequential ring opening of aziridines, nucleophilic substitution, and lactamization took place to provide a series of hexahydrobenz[e]isoindole compounds in good yields with good diastereoselectivities. By contrast, 3-benzazepine compounds were afforded in good yields via ring opening of aziridines and nucleophilic substitution when the N-substituent
已经开发出戏剧性的N-取代基控制的2-(2-(2-溴乙基)苯基)-1-磺酰基氮丙啶与1,3-二羰基化合物的串联环化。当N-取代基是4-甲基苯磺酰基(Ts)时,氮丙啶的连续开环,亲核取代和内酰胺化发生,从而以高收率和良好的非对映选择性提供了一系列六氢苯并[ e ]异吲哚化合物。相反,当N-取代基为4-硝基苯磺酰基(Ns)时,通过氮丙啶的开环和亲核取代以高收率获得3-苯并ze庚因化合物。