1,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochloride → Ethyl 7-(4-(2-bromo-4-chlorophenethylcarbamoyl)phenoxy)-6-chlorochroman-4-carboxylate

HRID 1048186Notes

Reaction equation

HRID 1048186 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][C:11]=1[O:12][C:13]1[CH:21]=[CH:20][C:16]([C:17]([OH:19])=O)=[CH:15][CH:14]=1)[O:8][CH2:7][CH2:6][CH:5]2[C:22]([O:24][CH2:25][CH3:26])=[O:23].O.ON1C2C=CC=CC=2N=N1.[Br:38][C:39]1[CH:44]=[C:43]([Cl:45])[CH:42]=[CH:41][C:40]=1[CH2:46][CH2:47][NH2:48].Cl.C(N=C=NCCCN(C)C)C>CN(C)C=O.O>[Br:38][C:39]1[CH:44]=[C:43]([Cl:45])[CH:42]=[CH:41][C:40]=1[CH2:46][CH2:47][NH:48][C:17]([C:16]1[CH:20]=[CH:21][C:13]([O:12][C:11]2[CH:10]=[C:9]3[C:4]([CH:5]([C:22]([O:24][CH2:25][CH3:26])=[O:23])[CH2:6][CH2:7][O:8]3)=[CH:3][C:2]=2[Cl:1])=[CH:14][CH:15]=1)=[O:19]

Participants

7

Reactant 4

HCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 27960291-Hydroxybenzotriazole hydrateHCID 582443954-(6-Chloro-4-(ethoxycarbonyl)chroman-7-yloxy)benzoic acidHCID 582446382-(2-Bromo-4-chlorophenyl)ethanamine

Product 1

HCID 67080384Ethyl 7-(4-(2-bromo-4-chlorophenethylcarbamoyl)phenoxy)-6-chlorochroman-4-carboxylateYield 57.9%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

To a stirred solution of 4-(6-chloro-4-(ethoxycarbonyl)chroman-7-yloxy)benzoic acid (Preparation 1; 1.32 g; 3.52 mmol), 1-hydroxybenzotriazole hydrate (0.59 g; 3.85 mmol) and 2-(2-bromo-4-chlorophenyl)ethanamine (Preparation 5; 0.904 g; 3.85 mmol) in dry dimethylformamide (10 mL) was added 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride (0.806 g; 4.02 mmol) at ambient temperature. After stirring at ambient temperature for 5 hours, the solution was diluted with 100 mL of water, stirred for 10 minutes longer and then extracted with ethyl acetate (3×15 mL). The combined organic layers were dried over sodium sulfate, filtered and concentrated in vacuo. The residue was purified by silica gel chromatography (Biotage 40M), eluting with hexane and ethyl acetate to provide ethyl 7-(4-(2-bromo-4-chlorophenethylcarbamoyl)phenoxy)-6-chlorochroman-4-carboxylate as a white solid (1.21 g). MS (apci, pos) m/z=594.

Workup

  1. stirringstirred for 10 minutes longer
  2. extractionextracted with ethyl acetate (3×15 mL)
  3. dry with materialThe combined organic layers were dried over sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. customThe residue was purified by silica gel chromatography (Biotage 40M)
  7. washeluting with hexane and ethyl acetate

Sources & evidence

ORD record
ord-0eae175e862b4343aaffb9b24f5df7bb
Source dataset
uspto-grants-2013_10
Patent number
US08569522B2

Reaction notes

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