N, N-Dimethylformamide (DMF)-Promoted Specific N-Alkylation of Hydroxyl N-Heterocycles with Organohalides: A Direct and Efficient Method for Synthesis of Pyridone Derivatives
Feng Han, Ting Wang, Bin Feng, Qing Xu
Chinese Journal of Organic Chemistry . 2021, (7): 2831 -2838 .  DOI: 10.6023/cjoc202102026