Dynamic Kinetic Sensitization of β‐Dicarbonyl Compounds—Access to Medium‐Sized Rings by De Mayo‐Type Ring Expansion
作者:Tiffany O. Paulisch、Lukas A. Mai、Felix Strieth‐Kalthoff、Michael J. James、Christian Henkel、Dirk M. Guldi、Frank Glorius
DOI:10.1002/anie.202112695
日期:2022.1.26
A photocatalyzed ring expansion procedure for a two-carbon homologation of cyclic carbonyl compounds, towards medium-sized ring systems, is introduced. Key to success is the catalyst fac-[Ir(CF3-pmb)3] (ET=73.3 kcal mol−1), which allows for selective activation of the substoichiometric enol species. The mechanism has been corroborated by time-resolved spectroscopy and enabled a full kinetic analysis
介绍了一种光催化扩环过程,用于环状羰基化合物的双碳同系化,朝向中型环系统。成功的关键是催化剂fac -[Ir(CF 3 -pmb) 3 ] ( E T =73.3 kcal mol -1 ),它允许选择性活化亚化学计量的烯醇物质。该机制已被时间分辨光谱证实,并能够对动态动力学敏化情景进行全面的动力学分析。
XIE, ZHUO-FENG;SUEMUNE, HIROSHI;SAKAI, KIYOSHI, SYNTH. COMMUN., 19,(1989) N-6, C. 987-992