Department of Chemistry, Oklahoma State University, 107 Physical Sciences, Stillwater, Oklahoma 74078, United States.
Department of Chemistry, University of California, Irvine, California 92697-2025, United States.
Org Lett. 2021 Feb 5;23(3):1103-1106. doi: 10.1021/acs.orglett.1c00023. Epub 2021 Jan 25.
The addition of tertiary carbon radicals generated from -(acyloxy)phthalimide esters to cyclic α,β-unsaturated ketones and lactones is markedly enhanced by the addition of substoichiometric amounts of a Ln(OTf). The reaction is accomplished by irradiation with visible light in the absence of a photosensitizer and is suggested to proceed by excitation of a ternary electron donor-acceptor complex between the NHPI ester, Hantzsch ester, and a Ln(OTf).
-(acyloxy)邻苯二甲酰亚胺酯生成的叔碳自由基与环状α,β-不饱和酮和内酯的加成反应，通过加入亚化学计量的Ln(OTf)显著增强。该反应在没有光催化剂的情况下通过可见光照射完成，并被认为是通过 NHPI 酯、Hantzsch 酯和 Ln(OTf)之间的三元电子给体-受体络合物的激发来进行的。
