Water → HCID 15411219, compound

HRID 1275857Notes

Reaction equation

HRID 1275857 reaction equation
[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6]([C:9]2[S:13][C:12]3[CH:14]=[C:15]([O:18][CH3:19])[CH:16]=[CH:17][C:11]=3[CH:10]=2)=[CH:5][CH:4]=1.[CH3:20][O:21][C:22]1[CH:23]=[C:24]([CH:28]=[C:29]([O:31][CH3:32])[CH:30]=1)[C:25](Cl)=[O:26].[Al+3].[Cl-].[Cl-].[Cl-].O>C(Cl)Cl.CCOC(C)=O>[CH3:32][O:31][C:29]1[CH:28]=[C:24]([CH:23]=[C:22]([O:21][CH3:20])[CH:30]=1)[C:25]([C:10]1[C:11]2[CH:17]=[CH:16][C:15]([O:18][CH3:19])=[CH:14][C:12]=2[S:13][C:9]=1[C:6]1[CH:7]=[CH:8][C:3]([O:2][CH3:1])=[CH:4][CH:5]=1)=[O:26]

Participants

7

Reactant 4

HCID 962WaterHCID 870033,5-Dimethoxybenzoyl chlorideHCID 8509416-Methoxy-2-(4-methoxyphenyl)benzo[b]thiopheneHCID 6451240Aluminum(III) Chloride

Product 1

HCID 15411219HCID 15411219, compoundYield 48%

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolvent2×HCID 8857Ethyl AcetateSolvent

Procedure

To a well-stirred solution of 2-(4'-methoxyphenyl)-6-methoxybenzo[b]thiophene (0.615 g, 2.27 mmol) and 3,5-dimethoxybenzoyl chloride (1.37 g, 6.83 mmol) in CH2Cl2 (45 mL) was added AlCl3 (1.21 g, 9.09 mmol) portion-wise over a 15 minute period. After 17 hours, water was added, and the product was isolated initially by extraction with CH2Cl2 and subsequently by extraction with EtOAc. The organic layers were separately washed with brine and then combined and dried over MgSO4. Purification by flash chromatography (silica gel, 60:40 EtOAc/hexane) afforded the title compound (0.475 g, 1.09 mmol, 48%) as an off-white solid. Recrystallization (hexane/ethanol) afforded a highly pure, crystalline sample with mp 114-120° C.: 1H-NMR (CDCl3, 360 Mhz): δ=7.59 (d, J=8.9 Hz, 1H, ArH), 7.32 (d, J=8.5 Hz, 2H, ArH), 7.32 (d, J=2.4 Hz, 1H, ArH), 6.98 (dd, J=9.0, 2.4 Hz, 1H, ArH), 6.94 (d, J=2.1 Hz, 2H, ArH), 6.76 (d, J=8.7 Hz, 2H, ArH), 6.52 (t, J=2.4 Hz, 1H, ArH), 3.89 (s, 3H, --OCH3), 3.76 (s, 3H, --OCH3), 3.71 (s, 6H, --OCH3); 13C-NMR (CDCl3, 90 Mhz): δ=194.0, 160.5, 159.8, 157.7, 143.9, 140.0, 139.3, 133.8, 130.3, 130.1, 126.0, 124.1, 114.9, 114.0, 107.6, 106.1, 104.4, 55.6, 55.5, 55.2. HRMS (EI) M+ calcd for C25H22O5S 434.1188, found 434.1245. Anal. Calcd. for C25H22O5S: C, 69.11; H, 5.10; S, 7.38. Found: C, 69.00; H, 5.16; S, 7.34.

Workup

  1. washThe organic layers were separately washed with brine
  2. dry with materialdried over MgSO4
  3. customPurification by flash chromatography (silica gel, 60:40 EtOAc/hexane)

Sources & evidence

ORD record
ord-1c84b880ff7241f7b9dc1e69686f8c10
Source dataset
uspto-grants-2000_12
Patent number
US06162930

Reaction notes

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