3-aminocyclopentanecarboxamides as modulators of chemotactic factor receptors
An alkyl and compound technology, applied in organic chemistry, active ingredients of heterocyclic compounds, etc., can solve the problem of cell infection and no effect.
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Embodiment 1
[0284]
[0285] N-[(1R,3S)-3-isopropyl-3-9{4-[3-(trifluoromethyl)phenyl]piperazin-1-yl}carbonyl]cyclopentyl]tetrahydro-2H - Preparation of pyran-4-amine
[0286] Step A-1
[0287]
[0288] (1R,4S)-4-[(tert-butoxycarbonyl)amino]cyclopent-2-ene-1-carboxylic acid methyl ester
[0289] To a solution of (1R,4S)-4-[(tert-butoxycarbonyl)amino]cyclopent-2-ene-1-carboxylic acid (10.0 g, 44 mmol) in DMF (25 mL) was added potassium carbonate (6.33 g, 45.8 mmol), followed by the addition of methyl iodide (4.0 mL, 64 mmol). After stirring overnight at room temperature, the reaction mixture was diluted with EtOAc. The solution was washed 4 times with water and 1 time with brine, dried (MgSO 4 ) and concentrate. The residue was dried under high vacuum overnight to give the title compound (11 g, 99%). C 12 h 19 NO 4 Calculated MS value: (M+H) + 242; Found 142.1 (M-Boc+H) + . 1 H NMR (CDCl 3 )δ5.86(m, 2H), 4.90(m, 1H), 4.80(m, 1H), 3.72(s, 3H), 3.50(m, 1H), 2.51(m, 1H), 1.86...
Embodiment 2
[0315] N-[(1R,3S)-3-isopropyl-3-({4-[4-(trifluoromethyl)phenyl]piperazin-1-yl}carbonyl)cyclopentyl]tetrahydro-2H - Preparation of pyran-4-amine
[0316]
[0317] The title compound was prepared in a manner similar to that described for Example 1 starting from N-(4-trifluoromethylphenyl)piperazine. C 25 h 36 f 3 N 3 o 2 MS calculated for: (M+H) 468; found 468.2.
Embodiment 3
[0319] N-[(1R,3S)-3-isopropyl-3-({4-[2-(trifluoromethyl)phenyl]piperazin-1-yl}carbonyl)cyclopentyl]tetrahydro-2H - Preparation of pyran-4-amine
[0320]
[0321] The title compound was prepared in a manner similar to that described for Example 1 starting from N-(2-trifluoromethylphenyl)piperazine. C 25 h 36 f 3 N 3 o 2 MS calculated for: (M+H) 468; found 468.2.
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