1. State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China
2. Department of Chemistry University of Science and Technology of China Hefei 230026 China
3. Institute of Organic Chemistry University of Ulm Albert‐Einstein‐Allee 11 89081 Ulm Germany
4. Department of Chemistry Tsinghua University Beijing 100084 China