1. C. Miu, X. Tu, J. I.D.Wu, Y. Zhang, Q. Zong, N. Wu, Synthesis of imidacloprid by series reaction, CN Pat., 104672212(2013).
2. N.M. Patel, A. Patel, K. Patel, B. Vyas, N. Nalwaya, Manufacture of imidacloprid useful for controlling sucking insects, India Pat. 21026916(2016).
3. X. Wu, Y. Ma, C. Zhang, Q. Wang, A new synthesis process of acetamiprid, CN Pat., 107353244(2017).
4. X. Hong, K. Liu, Z. Zhang, J. Zhao, Production process of acetamiprid, CN Pat., 104803910(2015).
5. K. Jelich, D. Kaufmann, B. Gallenkamp, R. Lantzsch, Preparation of 2-chloro-5- methyl-pyridine, Germany Pat. 4020053(1991).