Photoredox Catalysis Enables Decarboxylative Cyclization with Hypervalent Iodine(III) Reagents: Access to 2,5-Disubstituted 1,3,4-Oxadiazoles
作者:Jian Li、Xue-Chen Lu、Yue Xu、Jin-Xia Wen、Guo-Quan Hou、Li Liu
DOI:10.1021/acs.orglett.0c03663
日期:2020.12.18
A novel approach to 2,5-disubstituted 1,3,4-oxadiazoles derivatives via a decarboxylative cyclization reaction by photoredox catalysis between commercially available α-oxocarboxylic acids and hypervalent iodine(III) reagent is described. This powerful transformation involves the coupling reaction between two different kinds of radical species and the formation of C–N and C–O bonds.
Design, Synthesis, and Study of the Insecticidal Activity of Novel Steroidal 1,3,4-Oxadiazoles
作者:Shichuang Ma、Weiqi Jiang、Qi Li、Tian Li、Wenjun Wu、Hangyu Bai、Baojun Shi
DOI:10.1021/acs.jafc.1c00088
日期:2021.10.6
was designed and synthesized, and the target compounds were evaluated for their insecticidalactivity against five aphid species. Most of the tested compounds exhibited potent insecticidalactivity against Eriosoma lanigerum (Hausmann), Myzus persicae, and Aphis citricola. Compounds 20g and 24g displayed the highest activity against E. lanigerum, showing LC50 values of 27.6 and 30.4 μg/mL, respectively
One-Pot Synthesis of Decahydropyrene via Tandem C–H Activation/Intramolecular Diels–Alder/1,3-Dipolar Cycloaddition
作者:Hui Lin、Lin Dong
DOI:10.1021/acs.orglett.6b02768
日期:2016.11.4
A novel decahydropyrene synthesis has been successfully developed involving a tandem rhodium-catalyzed C–H activation/intramolecular Diels–Alder reaction/1,3-dipolar cycloaddition cascade process by using diazole as a tracelessdirectinggroup. The advantage of this one-pot strategy is a quite simple, efficient, highly stereoselective, and unique product structure.