3-Phenoxybenzyl chloride → 9-[(3-phenoxyphenyl)methyl]-5-carbomethoxy-1,2-dihydrocarbazol-4(3H)-one

HRID 567276Notes

Reaction equation

HRID 567276 reaction equation
[C:1]([C:5]1[CH:17]=[CH:16][CH:15]=[C:14]2[C:6]=1[C:7]1[C:8](=[O:18])[CH2:9][CH2:10][CH2:11][C:12]=1[NH:13]2)([O:3][CH3:4])=[O:2].[O:19]([C:26]1[CH:27]=[C:28]([CH:31]=[CH:32][CH:33]=1)[CH2:29]Cl)[C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1>CN(C=O)C.C(OCC)(=O)C>[O:19]([C:26]1[CH:27]=[C:28]([CH2:29][N:13]2[C:12]3[CH2:11][CH2:10][CH2:9][C:8](=[O:18])[C:7]=3[C:6]3[C:14]2=[CH:15][CH:16]=[CH:17][C:5]=3[C:1]([O:3][CH3:4])=[O:2])[CH:31]=[CH:32][CH:33]=1)[C:20]1[CH:21]=[CH:22][CH:23]=[CH:24][CH:25]=1

Participants

5

Reactant 2

HCID 932913-Phenoxybenzyl chlorideHCID 11368514methyl 4-oxo-2,3,4,9-tetrahydro-1H-carbazole-5-carboxylate

Product 1

HCID 227399269-[(3-phenoxyphenyl)methyl]-5-carbomethoxy-1,2-dihydrocarbazol-4(3H)-oneYield 58.1%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

40% Methanolic Triton B (1.53 mL, 3.4 mM) was slowly added dropwise to a solution of 5-carbomethoxy-1,2-dihydro-9H-carbazol-4(3H)-one (554.6 mg, 2.28 mM) in 5 mL of DMF at 25° C. After 5 minutes, 3-phenoxybenzyl chloride (748.0 mg, 3.42 mM) was added and the resultant mixture stirred at room temperature for 24 hours. The mixture was diluted with ethyl acetate, washed three times with 1N HCl, three times with H2O, once with saturated brine, dried over anhydrous magnesium sulfate, filtered, and concentrated. The residue was purified by column chromatography on silica gel (elution with gradient methylene chloride/ethyl acetate) to afford 563.6 mg (58%) of 9-[(3-phenoxyphenyl)methyl]-5-carbomethoxy-1,2-dihydrocarbazol-4(3H)-one as a thick yellow oil. 1H NMR (DMSO-d6) δ 7.7 (dd, 1H, J=1 and 8 Hz), 7.4-7.2 (m, 6H), 7.1 (t, 1H, J=8 Hz), 6.95 (m, 2H), 6.8-6.7 (m, 2H), 5.55 (s, 2H), 3.75 (s, 3H), 3.0 (t, 2H, J=6 Hz), 2.45 (t, 2H, J=6 Hz), and 2.1 (m, 2H). IR (CHCl3, cm−1) 3050, 2950, 1725, 1653, 1585, 1487, 1465, 1288, 1252, and 1119. MS (ES) m/e 426.

Workup

  1. washwashed three times with 1N HCl, three times with H2O
  2. dry with materialonce with saturated brine, dried over anhydrous magnesium sulfate
  3. filtrationfiltered
  4. concentrationconcentrated
  5. customThe residue was purified by column chromatography on silica gel (elution with gradient methylene chloride/ethyl acetate)

Sources & evidence

ORD record
ord-021bce50d52c408db6d06559735d40c5
Source dataset
uspto-grants-2001_01
Patent number
US06177440B1

Reaction notes

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