Rhenium-catalyzed synthetic method of 1,2-dihydroisoquinolines and isoquinolines by the intramolecular cyclization of 2-alkynylaldimines or 2-alkynylbenzylamines
作者:Rui Umeda、Tetsuya Ishida、Shintaro Mori、Hiroki Yashima、Tatsuo Yajima、Issey Osaka、Riko Takata、Yutaka Nishiyama
DOI:10.1016/j.tet.2024.133854
日期:2024.3
rhenium-catalyzed synthetic method of 1,2-dihydroisoquinolines and isoquinolines has been developed. When the 2-alkynylarylaldimines were reacted with various pronucleophiles, such as nitromethane, dimethyl malonate, and phenylacetylene, in the presence of a rhenium catalyst, cyclization and subsequent nucleophilic addition proceeded to give the corresponding 1,2-dihydroisoquinolines in moderate to good yields
开发了一种铼催化合成1,2-二氢异喹啉和异喹啉的方法。当2-炔基芳基醛亚胺与各种亲核试剂(例如硝基甲烷、丙二酸二甲酯和苯乙炔)在铼催化剂存在下反应时,发生环化和随后的亲核加成,以中等至良好的收率得到相应的1,2-二氢异喹啉。当使用氢硅烷、烯丙基锡烷和烯酮甲硅烷基缩醛代替亲核试剂时,氢化物、烯丙基和-C(CH)COOCH基团被引入到1,2-二氢异喹啉的1位上。 1,2-二氢异喹啉也可通过铼催化的 2-炔基苄胺环化合成。异喹啉的合成是通过使用-丁基-2-炔基醛亚胺来实现的,该亚胺是通过2-炔基苯甲醛和-丁胺的反应制备的。