Visible-Light-Mediated Iminyl Radical Generation from Benzyl Oxime Ether: Synthesis of Pyrroline via Hydroimination Cyclization
作者:Kaoru Usami、Eiji Yamaguchi、Norihiro Tada、Akichika Itoh
DOI:10.1021/acs.orglett.8b02429
日期:2018.9.21
of an O-(4-methoxybenzyl) oxime ether bearing an olefin substituent and 1-chloroanthraquinone (1-Cl-AQN) catalyst in 2-butanone under visible-light irradiation affords pyrroline via an iminyl radical intramolecular hydroimination. Mechanistic studies indicate that iminyl radical generation mainly proceeds by hydrogen abstraction of the photocatalyst from the benzyl position of the oxime. Moreover,
在可见光照射下,在2-丁酮中处理带有烯烃取代基的 O-(4-甲氧基苄基)肟醚和1-氯蒽醌(1-Cl-AQN)催化剂,通过亚氨基自由基分子内氢化作用得到吡咯啉。机理研究表明,亚胺基自由基的产生主要是通过从肟的苄基位置提取光催化剂的氢来进行的。此外,从AQN和2-丁酮之间的底物的苄基位置循环中鉴定出氢原子,以淬灭碳自由基,而无需任何其他试剂。