With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.147362-88-7,N-(6-Chloropyridazin-3-yl)pivalamide,as a common compound, the synthetic route is as follows.
A mixture of N-(6-chloro-3-pyridazinyl)-2,2-dimethylpropanamide (65.3 g; 305.6 mmol) and morpholine (538 mL; 6.1 mmol) was heated at 120 C for 24 hours. The mixture was cooled and evaporated. The residue was poured into cooled water, basified with K2CO3 powder and DCM was added. The organic layer was separated, dried over MgSOzi, filtered and evaporated to dryness. The residue was crystallized from Epsilon2Omicron. The precipitate was filtered and dried to afford 69.3 g (87%) of intermediate 58., 147362-88-7
As the paragraph descriping shows that 147362-88-7 is playing an increasingly important role.
Reference：
Patent; JANSSEN PHARMACEUTICA NV; MEVELLEC, Laurence, Anne; MEERPOEL, Lieven; COUPA, Sophie; PONCELET, Virginie, Sophie; PILATTE, Isabelle, Noelle, Constance; PASQUIER, Elisabeth, Therese, Jeanne; BERTHELOT, Didier, Jean-Claude; QUEROLLE, Olivier, Alexis, Georges; MEYER, Christophe; ANGIBAUD, Patrick, Rene; DEMESTRE, Christophe, Gabriel, Marcel; MERCEY, Guillaume, Jean, Maurice; (203 pag.)WO2016/97359; (2016); A1;,
Pyridazine – Wikipedia
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