Animal and human Anti-trypanosomonal and Anti-leishmania agents
A compound, aminopurine technology, applied in the field of trypanosomiasis or leishmaniasis, treatment or prevention of trypanosomiasis, can solve the problems of long duration of treatment, lack of compliance, difficulty in administration, etc.
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Embodiment 1
[0244] Example 1: N8-(3-chlorophenyl)-N2-(4-methyltetrahydro-2H-pyran-4-yl)-9-((1S,4S)-4-(piperidine-1 -ylmethyl)cyclohexyl)-9H-purine-2,8-diamine
[0245]
[0246] ((1S,4S)-tert-butyl 4-(piperidine-1-carbonyl)cyclohexyl)carbamate. To a stirred solution of (1S,4S)-4-((tert-butoxycarbonyl)amino)cyclohexane-1-carboxylic acid (1.5 g, 6.0 mmol) in DMF (20 mL) was added DIPEA ( 2 mL, 12.5 mmol), piperidine (0.63 g, 7.5 mmol), EDCI (2.35 g, 12.5 mmol) and HOBT (1.88 g, 12.5 mmol). The reaction mixture was stirred for 16h. Reaction completion was confirmed by UPLC. The product was isolated and triturated with petroleum ether to give tert-butyl ((1S,4S)-4-(piperidine-1-carbonyl)cyclohexyl)carbamate (1.9 g) as an off-white solid. MS(ESI)m / z 311[M+1] + .
[0247] ((1S,4S)-4-Aminocyclohexyl)(piperidin-1-yl)methanone. To a stirred solution of ((1S,4S)-4-(piperidine-1-carbonyl)cyclohexyl)carbamate tert-butyl ester (1.9 g, 6.5 mmol) in DCM (20 mL) was added di HCl in oxane (2 mL). ...
Embodiment 2
[0253] Example 2: N8-(3-chlorophenyl)-N2-(4-methyltetrahydro-2H-pyran-4-yl)-9-((1S,4S)-4-(morpholinemethyl )cyclohexyl)-9H-purine-2,8-diamine
[0254]
[0255] ((1S,4S)-tert-butyl 4-(morpholine-4-carbonyl)cyclohexyl)carbamate. To a stirred solution of (1S,4S)-4-((tert-butoxycarbonyl)amino)cyclohexane-1-carboxylic acid (3 g, 12 mmol) in DMF (30 mL) was added DIPEA (4.5 mL) at ambient temperature , 24mmol), morpholine (1.28g, 14.76mmol), EDCI (4.70g, 24.6mmol) and HOBT (3.76g, 24.6mmol). The reaction mixture was stirred for 16h. Reaction completion was confirmed by UPLC. The product was isolated and triturated with petroleum ether to afford tert-butyl ((1S,4S)-4-(morpholine-4-carbonyl)cyclohexyl)carbamate (2.65 g, 75%) as an off-white solid. MS(ESI)m / z 313[M+1] + .
[0256] ((1S,4S)-4-Aminocyclohexyl)(morpholino)methanone. To a stirred solution of ((1S,4S)-4-(morpholine-4-carbonyl)cyclohexyl)carbamate tert-butyl ester (2.65 g, 8.5 mmol) in DCM (50 mL) was added di HCl...
Embodiment 3
[0262] Example 3: (1S,4S)-4-((2-Chloro-5-nitropyrimidin-4-yl)amino)cyclohexane-1-carboxamide
[0263]
[0264] cis-(4-carbamoyl-cyclohexyl)-carbamate tert-butyl ester. cis-4-tert-butoxycarbonylamino-cyclohexanecarboxylic acid (1 equiv) and TEA (1.1 equiv) were dissolved in 0.3M THF, and the mixture was cooled to 0°C. Ethyl chloroformate (1.1 equiv) was added dropwise. After stirring at 0 °C for 30 min, NH in THF was added 3 . The mixture was stirred at -78 °C for 2 h. The mixture was diluted with water, and the solvent was evaporated until only water remained. The resulting precipitate was collected by filtration and dried under vacuum to afford cis(4-carbamoyl-cyclohexyl)-carbamate tert-butyl ester (45%) as a white solid. 1 H NMR (400MHz, DMSO-d 6 )δppm 7.10(brs,1H),6.69(brs,2H),3.41(brs,1H),2.10(m,1H),1.72(m,2H),1.53(m,2H),1.42(m,4H) ,1.36(s,9H).
[0265] cis-4-amino-cyclohexanecarboxylic acid amide hydrochloride. To a solution of cis-(4-carbamoyl-cyclohexyl)-car...
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