Novel cannabinoid receptor ligands, pharmaceutical compositions containing them, and processes for their preparation
A diene and diazepine technology, applied in the field of cannabinoid receptor modulators, can solve problems such as poor compliance and liver toxicity
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Embodiment 1
[0751] Example 1: 5-(2,4-difluorophenyl)-4,5-diazatricyclo[5.2.1.0 2,6 .]dec-2(6),3-dien-3-yl- Preparation of phenyl phenone:
[0752] The Grignard reagent was generated from bromobenzene (187 μl, 1.80 mmol) and magnesium turnings (50 mg, 2.10 mgatoms) in ether (15 ml) and was added dropwise with intermediate 6 ( 500 mg, 1.50 mmol), and the mixture was stirred at room temperature for 2 hours. Add saturated NH 4 Cl aqueous solution and extracted with ethyl acetate. The organic layer was washed with brine, Na 2 SO 4 , and evaporate the solvent. Purification by chromatography followed by preparative HPLC provided the title compound as a waxy solid (269 mg, 51%). 1 H-NMR (δppm, CDCl 3 , 300MHz): 8.30(d, J=7.2, 2H); 7.79-7.68(m, 1H); 7.62-7.44(m, 3H); 7.02(t, J=9.0, 2H); 3.70(br.s, 1H); 3.51(br.s, 1H); 2.14(d, J=8.4, 1H); 1.99(d, J=7.5, 2H); 1.72(d, J=8.4, 1H), 1.28(d, J =9.3, 2H). MS (m / z): 351.41 ([M+H] + ).
Embodiment 2
[0753] Example 2: 1-[5-(2,4-difluorophenyl)-4,5-diazatricyclo[5.2.1.0 2,6 ]dec-2(6),3-diene-3- The preparation of base]-1-hexanone:
[0754] The title compound was synthesized by a method similar to that described for Example 1. Intermediate 6 (500 mg, 1.50 mmol), Mg turnings (50 mg, 2.10 mmol), diethyl ether (15 mL), 1-bromo-n-pentane (223 μl, 1.80 mmol) provided the title compound as pale yellow Oil (125 mg, 24%). 1 H-NMR (δppm, CDCl 3 , 300MHz): 7.74-7.68(m, 1H), 7.07-7.00(m, 2H); 3.71(br.s, 1H); 3.46(br.s, 1H); 3.05-2.95(m, 2H); 2.07 (d, J = 9.0, 1H); 1.96 (d, J = 9.0, 2H); 1.80-1.60 (m, 3H); 1.42-1.30 (m, 4H); 1.22 (d, J = 10.2, 2H); 0.95-0.86 (m, 3H). IR (cm -1 , KBr): 3091(m), 2956(s), 2932(s), 2872(s), 1683(s), 1610(m), 1521(s), 1428(m), 1404(m), 1367 (m), 1325(w), 1270(m), 1189(w), 1145(m), 1092(m), 965(m). MS (m / z): 345.38 ([M+H] + ).
Embodiment 3
[0755] Example 3: 5-(2,4-difluorophenyl)-4,5-diazatricyclo[5.2.1.0 2,6 .]dec-2(6),3-dien-3-yl - Preparation of 1-naphthyl ketone:
[0756] The title compound was synthesized by a method similar to that described for Example 1. Intermediate 6 (500 mg, 1.50 mmol), Mg turnings (50 mg, 2.10 mmol), diethyl ether (15 mL), 1-bromonaphthalene (250 μl, 1.80 mmol) provided the title compound after purification by preparative HPLC As an off-white solid (66 mg, 11%). M.P.: 81-84°C. 1 H-NMR (δppm, CDCl 3 , 300MHz): 8.37(d, J=5.7, 1H); 8.02-7.98(m, 2H); 7.90(d, J=5.7, 1H); 7.74-7.66(m, 1H); 7.60-7.50(m, 3H); 7.09-6.90 (m, 2H); 3.50 (br.s, 1H); 3.39 (br.s, 1H); 2.10 (d, J=9.0, 1H); 2.02-1.89 (m, 2H); 1.66 (d, J=9.0, 1H); 1.30-1.19 (m, 2H). MS (m / z): 401.38 ([M+H] + ).
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