May-Jun 1998 Functionalization of 4,5-Dihalopyridazin-6-ones Using 1-(1,1- Dibromo-2-oxopropyl) Derivatives Young-Jin Kang, Hyun-A Chung, Deok-Heon Kweon, Su-Dong Cho, Sang-Gyeong Lee, Sung-Kyu Kim and Yong-Jin Yoon* 595 Department of Chemistry & Research Institute of Natural Sciences, Gyeongsang National University, Chinju 660-701, Korea Received February 11, 1998 Functionalization of 4,5-dihalopyridazin-6-ones using l-(l,l- ...