Sulfo-tetrahydro-pyridino-dihydro-pyrimidone derivative, preparation method for same and application thereof
A technology of dihydropyrimidinone and tetrahydropyridine, applied in the fields of thiotetrahydropyridodihydropyrimidinone derivatives, their preparation and application, to achieve the effects of easy production, convenient post-processing, and convenient post-processing
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Embodiment 1
[0057] Example 1 Preparation of 4-phenyl-6-p-fluorobenzyl-8-benzylidene-1,2,5,6-tetrahydropyrido[4,3-d]-3,4-dihydropyrimidine- 2-thione (Ia);
[0058] At room temperature, add 0.16mol methyl acrylate and 7mL methanol into a 100mL three-necked flask, and slowly add a mixture of 0.04mol p-fluorobenzylamine and 4mL methanol into the three-necked flask while stirring, so that the temperature of the reaction system does not exceed 50°C . After the dropwise addition, heat and reflux for 8 hours. After the reaction is over, recover methanol and unreacted methyl acrylate, and distill under reduced pressure to obtain light yellow oily liquid N,N-bis(β-methyl propionate)-p-fluorobenzyl Amine (2a).
[0059] Add 15mL of anhydrous toluene and 0.122mol of sodium metal to a 250mL dry three-necked flask, stir and heat to reflux, add 0.2mL of anhydrous methanol, and then slowly add 0.04mol of N,N-bis(β-propionate methyl ester)) Mixture of p-fluorobenzylamine (2a) and 20mL of anhydrous tolue...
Embodiment 2
[0063] Example 2: Preparation of 4-p-fluorophenyl-6-p-fluorobenzyl-8-p-fluorobenzylidene-1,2,5,6-tetrahydropyrido[4,3-d]-3,4 - dihydropyrimidine-2-thione (Ib);
[0064] N-p-fluorobenzylpiperidin-4-one (4a) obtained by the preparation method of Example 1, get N-p-fluorobenzylpiperidin-4-one (4a) 0.005mmol and 0.01mol p-fluorobenzaldehyde Mix in a dry 50mL round bottom bottle, add 15mL of absolute ethanol, add 1mL of 10% NaOH while stirring, and a solid precipitates out after about 40min. After the reaction, the solid was washed with ethanol, and recrystallized with ethyl acetate and petroleum ether to obtain N-(4-fluorobenzyl)-3,5-bis(4-fluorobenzylidene)piperidin-4-one (5b).
[0065] Add 10mL of absolute ethanol and 0.005mol of sodium hydroxide to a 100mL dry three-necked flask, stir at room temperature for 5min, then add 0.001mol of N-(4-fluorobenzyl)-3,5-bis(4-fluorobenzylidene base) piperidin-4-one and 0.002 mol of thiourea, set the temperature at 65°C, and used microwav...
Embodiment 3
[0067] Example 3: Preparation of 4-p-tolyl-6-p-fluorobenzyl-8-p-methylbenzylidene-1,2,5,6-tetrahydropyrido[4,3-d]-3,4- Dihydropyrimidine-2-thione (Ic);
[0068] N-p-fluorobenzylpiperidin-4-one (4a) obtained by the preparation method of Example 1, get N-p-fluorobenzylpiperidin-4-one (4a) 0.005mmol and 0.01mol p-toluene Formaldehyde was mixed in a 50mL round bottom bottle, 15mL of absolute ethanol was added, 1mL of 10% NaOH (mass fraction) was added with stirring, and stirred at room temperature for 30min, a yellow solid was precipitated, and the reaction progress was tracked by thin layer chromatography (TLC). After the reaction is over, wash the solid with ethanol, and recrystallize with ethyl acetate and petroleum ether to obtain N-(4-fluorobenzyl)-3,5-bis(4-methylbenzylidene)piperidine-4- Ketone (5c).
[0069] Add 10 mL of absolute ethanol and 0.005 mol of sodium hydroxide to a 100 mL dry three-necked flask, stir at room temperature for 5 min, then add 0.001 mol of N-(4-fl...
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