135216-65-8

Upstream product

• 33048-38-3 4-isopropyl-6-phenyl-2H-pyridazin-3-one 
• 1071540-12-9 6-(3-chlorophenyl)-4-ethylpyridazin-3(2H)-one 
• 99-02-5 3'-Chloroacetophenone 
• 1071540-10-7 3-chloro-6-(3-chlorophenyl)-4-ethylpyridazine 
• 74-88-4 methyl iodide 

Downstream Products

• 135216-80-7 3-phenyl-5-isopropylpyridazine 

Relevant academic research and scientific papers

AURORA KINASE MODULATORS AND METHOD OF USE

The present invention relates to chemical compounds having a general formula (I) wherein A1-5 and 7-8, D', L1, L2, R1, R3, R6-8, n and o are defined herein, and synthetic intermediates, which are capable of modulating the activity of Aurora kinase proteins and, thereby, influencing various disease states and conditions related to the activities of Aurora kinases. For example, the compounds are capable of influencing the process of cell cycle and cell proliferation to treat cancer and cancer-related diseases. The invention also includes pharmaceutical compositions, including the compounds, and methods of treating disease states related to the activity of Aurora kinase.

Design, synthesis, and structure-activity relationships of a series of 3-[2-(1-benzylpiperidin-4-yl)ethylamino]pyridazine derivatives as acetylcholinesterase inhibitors

Starting from the 3-[2-(1-benzylpiperidin-4-yl)ethylamino]-6-phenylpyridazine 1, we performed the design, the synthesis, and the structure-activity relationships of a series of pyridazine analogues acting as AChE inhibitors. Structural modifications were achieved on four different parts of compound 1 and led to the following observations: (i) introduction of a lipophilic environment in the C-5 position of the pyridazine ring is favorable for the AChE-inhibitory activity and the AChE/BuChE selectivity; (ii) substitution and various replacements of the C-6 phenyl group are possible and led to equivalent or slightly more active derivatives; (iii) isosteric replacements or modifications of the benzylpiperidine moiety are detrimental to the activity. Among all derivatives prepared, the indenopyridazine derivative 4g was found to be the more potent inhibitor with an IC50 of 10 nM on electric eel AChE. Compared to compound 1, this represents a 12-fold increase in potency. Moreover, 3-[2-(1-benzylpiperidin-4-yl)ethylamino]-5-methyl-6-phenylpyridazine 4c, which showed an IC50 of 21 nM, is 100-times more selective for human AChE (human BuChE/AChE ratio of 24) than the reference compound tacrine.