Piperazinone compounds and application thereof
A technology of metabolites and prodrugs, applied in organic chemistry, drug combination, medical preparations containing active ingredients, etc.
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Embodiment 1
[0030] Example 1: 1-ethyl-4-{4-[5-hydroxyl-2-(4-hydroxyphenyl)-3-methyl-1H-indol-1-yl]butyl}piperazine-2 , Preparation of 3-diketone
[0031] Step A): Preparation of 4-nitrobenzyloxybenzene
[0032] Put 4-nitrophenol (20.0g, 0.152mol) and anhydrous potassium carbonate (131.1g, 0.950mol) in a 1000mL flask, use acetone as solvent, add dropwise benzyl chloride (12.0g, 0.095mol), and reflux reaction After 24 hours, the solvent was evaporated under reduced pressure, the residue was stirred with water, filtered with suction, and dried to obtain 19.8 g of a light yellow solid with a yield of 90.8%. m.p.105-106°C. ESI-MS: m / z139 ([M+H] + ).
[0033] Step B): Preparation of 4-benzyloxyaniline
[0034] Put 4-nitrobenzyloxybenzene (10.0g, 0.044mol) and tin protochloride (50g, 0.220mol) in a 1000mL round bottom flask, ethanol as solvent, N 2 Under protection, react at 45°C for 24h. Evaporate the solvent under reduced pressure, transfer the residue to a 1000mL beaker with 600mL of s...
Embodiment 3
[0051] Embodiment 3: tablet
[0052]
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