Sodium Carbonate → 6-[2-(3-chloro-4-methoxyphenyl)ethyl]-6-cyclopentyl-3-[(1-methyl-1H-benzimidazol-2-yl)methyl]dihydro-2H-pyran-2,4(3H)-dione

HRID 1453218

Reaction equation

HRID 1453218 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([CH2:10][CH2:11][C:12]2([CH:20]3[CH2:24][CH2:23][CH2:22][CH2:21]3)[O:17][C:16](=[O:18])[CH2:15][C:14](=[O:19])[CH2:13]2)[CH:5]=[CH:6][C:7]=1[O:8][CH3:9].C(=O)([O-])[O-].[Na+].[Na+].Cl[CH2:32][C:33]1[N:37]([CH3:38])[C:36]2[CH:39]=[CH:40][CH:41]=[CH:42][C:35]=2[N:34]=1>COC(O)C(O)OC.O>[Cl:1][C:2]1[CH:3]=[C:4]([CH2:10][CH2:11][C:12]2([CH:20]3[CH2:24][CH2:23][CH2:22][CH2:21]3)[O:17][C:16](=[O:18])[CH:15]([CH2:32][C:33]3[N:37]([CH3:38])[C:36]4[CH:39]=[CH:40][CH:41]=[CH:42][C:35]=4[N:34]=3)[C:14](=[O:19])[CH2:13]2)[CH:5]=[CH:6][C:7]=1[O:8][CH3:9]

Participants

6

Reactant 3

HCID 10340Sodium CarbonateHCID 2480442-(Chloromethyl)-1-methylbenzimidazoleHCID 160761096-(3-chloro-4-methoxyphenethyl)-6-cyclopentyl-dihydro-3H-pyran-2,4-dione

Product 1

HCID 587627306-[2-(3-chloro-4-methoxyphenyl)ethyl]-6-cyclopentyl-3-[(1-methyl-1H-benzimidazol-2-yl)methyl]dihydro-2H-pyran-2,4(3H)-dioneYield 7.5%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 21263609Dimethoxy ethylene glycolSolvent

Conditions

Temperature
80 °C

Procedure

6-[2-(3-chloro-4-methoxyphenyl)ethyl]-6-cyclopentyldihydro-2H-pyran-2,4(3H)-dione (127 mg, 0.362 mmol) was dissolved in a mixture of dimethoxy ethylene glycol (1.8 ml) and water (1.8 ml). The solution was heated to 80° C. Sodium carbonate (42.2 mg, 0.398 mmol) was then added to the mixture followed by 2-(chloromethyl)-1-methyl-1H-benzimidazole (42.2 mg, 0.398 mmol). The reaction mixture was stirred at 80° C. for 5 hrs, after which time the mixture was acidified to pH 5 and the product was extracted with ethyl acetate (3×25 ml). The combined organics were washed with brine (30 ml), dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated in vacuo and purified by prep HPLC to afford the title compound as a white solid (13.5 mg). 1H NMR (CDCl3): δ 1.30-1.80 (bm, 11H), 2.22 (m, 1H), 2.50 (t, J=8.29 Hz, 2H), 2.92 (d, J=8.10 Hz, 2H), 3.78 (s, 3H), 4.01 (s, 3H), 4.26 (d, J=7.35 Hz, 1H), 6.87 (d, J=2.26 Hz, 1H), 6.90 (s, 1H), 7.00 (d, J=2.07 Hz, 2H), 7.44 (m, 3H), 7.54 (m, 1H), 7.84 (m, 1H). Exact Mass: Calcd, 495.01; Found, 494.20.

Workup

  1. extractionthe product was extracted with ethyl acetate (3×25 ml)
  2. washThe combined organics were washed with brine (30 ml)
  3. dry with materialdried over anhydrous sodium sulfate
  4. filtrationfiltered
  5. concentrationThe filtrate was concentrated in vacuo
  6. custompurified by prep HPLC

Sources & evidence

ORD record
ord-f330e2e7a49e4193b5916ffded63447d
Source dataset
uspto-grants-2009_01
Patent number
US07473790B2

Linked notes

Loading…