Limei Zhou,Mengyun Yin,Xiaohui Jiang,Qiang Huang,Wencheng Lang
1,3-Diamino-graphene (NH2-G-NH2) materials were synthesized using a simple chemical method. The as-prepared materials were characterized using FT-IR, TG, XRD, XPS, and SEM measurements. The results revealed that a 1,3-diamino group was successfully grafted on graphene and could immobilize CuI by coordination interactions. The NH2-G-NH2 materials can be used as heterogeneous ligands for CuI-catalyzed C–N coupling reactions, and the desired products were obtained with good yields. The reaction system is much smoother at lower temperature compared with others previously reported. Additionally, the new method can easily realize the purification of products and recycling of catalysts.
Tu Xingzhao,Xiong Jing,Li Zhijie,Zhou Lihong,Emmanouil Christina,Zeng Qingle
Abstract The valuable 2-( tert -butyldisulfanyl)heterocycles were effectively synthesized from 2-mercaptoheterocycles and tert -butanesulfinamide via unusual condensation. The reaction between 2-mercapto sulfur-containing heterocycles and tert -butanesulfinamide was performed under ligand-free CuI-catalyzed conditions. The synthetic processes described herein are simple, cost-efficient, and practical. Furthermore, a plausible mechanism is proposed for this transformation. Graphical abstract