neutral visible light-induced regioselective C(sp2)–H imidation of electron-rich arenes and heteroarenes using conceptually designed redox-active 1 as a source of the N-centered imidyl radical. Structurally diverse aromatic imides were obtained in moderate to good yields. This methodology has been successfully employed for the late stage imidation of complex molecules and has also been applied towards
我们在此报道了一种氧化还原中性可见光诱导的富电子芳烃和杂芳烃的区域选择性 C(sp 2 )–H 亚胺化,使用概念设计的氧化还原活性1作为以 N 为中心的亚胺自由基的来源。以中等到良好的产率获得了结构多样的芳香族酰亚胺。该方法已成功用于复杂分子的后期酰亚胺化,也已应用于海洋天然产物 carpatamides A、B 和 D 的正式全合成。进一步表明,生成的酰亚胺可以很容易地转化为直接就地生成相应的苯胺。
10.1002/adsc.202400535
作者:Tang, King Hung Nigel、Takahashi, Haluhi、Tokutake, Ryo、Shibata, Takanori
DOI:10.1002/adsc.202400535
日期:——
A mechanism‐navigated enantioselective alkylation of an indole C2 C–Hbond with an internal alkene was developed. Under the inharmonious ligand‐to‐metal catalyst ratio, a moderate enantiomeric ratio (er) was achieved with our original ligand. We propose that chain‐walking and bondformation are mechanistically independent, and suggest that hydridoiridium does not play a role in the chain‐walking process
Ir-Catalyzed Enantioselective Formal C–H Conjugate Addition of Pyrrole and Indoles to α,β-Unsaturated Carbonyl Compounds
作者:Takanori Shibata、Mio Sasaki、Masafumi Kojima、Mamoru Ito
DOI:10.1021/acs.orglett.1c03375
日期:2021.12.3
The chiral Ir(I)-catalyzed intermolecular reaction of N-carbamoylpyrrole and indole derivatives with α,β-unsaturated carbonylcompounds such as crotonates proceeded with high enantioselectivity. The obtained chirally functionalized pyrroles and indoles are formal C–H conjugate adducts. The reaction mechanism was studied by deuterium labeling experiments.