Visible‐Light‐Induced Synthesis of 1,2,3,4‐Tetrahydroquinolines through Formal [4+2] Cycloaddition of Acyclic α,β‐Unsaturated Amides and Imides with
<i>N</i>
,
<i>N</i>
‐Dialkylanilines
作者:Kennosuke Itoh、Shun‐ichi Nagao、Ken Tokunaga、Shigeto Hirayama、Fumika Karaki、Takaaki Mizuguchi、Kenichiro Nagai、Noriko Sato、Mitsuaki Suzuki、Masashi Hashimoto、Hideaki Fujii
DOI:10.1002/chem.202004186
日期:2021.3.17
facile synthesis of 1,2,3,4‐tetrahydroquinolines that is achieved by a photoinduced formal [4+2] cycloaddition reaction of acyclic α,β‐unsaturated amides and imides with N,N‐dialkylanilines under visible‐light irradiation, in which a new IrIII complex photosensitizer, a thiourea, and an oxidant act cooperatively in promoting the reaction, is reported. The photoreaction enables the synthesis of a wide
1,2,3,4-四氢喹啉应适用于新药物的开发。在可见光下,通过无环α,β-不饱和酰胺和酰亚胺与N,N-二烷基苯胺的光诱导形式[4 + 2]形式加成[4 + 2]环加成反应,可轻松合成1,2,3,4-四氢喹啉。报道了一种新的Ir III复合光敏剂,硫脲和氧化剂在促进反应中的协同作用。通过光反应,可以合成多种1,2,3,4-四氢喹啉,同时控制反式/顺式非对映选择性(> 99:1)和构建连续的立体生成中心。证明了无环酰亚胺助剂的化学选择性裂解。