Triethylamine → Benzyl 4-((4-(5-bromo-4-(2-ethoxy-2-oxoethyl)thiophene-2-carbonyl)-2-nitrophenyl)ethynyl)benzoate

HRID 1952528Notes

Reaction equation

HRID 1952528 reaction equation
[Br:1][C:2]1[S:3][C:4]([C:13](=[O:24])[C:14]2[CH:19]=[CH:18][C:17](I)=[C:16]([N+:21]([O-:23])=[O:22])[CH:15]=2)=[CH:5][C:6]=1[CH2:7][C:8]([O:10][CH2:11][CH3:12])=[O:9].[C:25]([C:27]1[CH:42]=[CH:41][C:30]([C:31]([O:33][CH2:34][C:35]2[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=2)=[O:32])=[CH:29][CH:28]=1)#[CH:26].C([O-])([O-])=O.[K+].[K+].CCN(CC)CC>CN(C=O)C.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.O>[Br:1][C:2]1[S:3][C:4]([C:13]([C:14]2[CH:19]=[CH:18][C:17]([C:26]#[C:25][C:27]3[CH:42]=[CH:41][C:30]([C:31]([O:33][CH2:34][C:35]4[CH:36]=[CH:37][CH:38]=[CH:39][CH:40]=4)=[O:32])=[CH:29][CH:28]=3)=[C:16]([N+:21]([O-:23])=[O:22])[CH:15]=2)=[O:24])=[CH:5][C:6]=1[CH2:7][C:8]([O:10][CH2:11][CH3:12])=[O:9]

Participants

8

Reactant 4

HCID 8471TriethylamineHCID 11430Potassium CarbonateHCID 67495826Ethyl 2-(2-bromo-5-(4-iodo-3-nitrobenzoyl)thiophen-3-yl)acetateHCID 86664843Benzyl 4-ethynylbenzoate

Product 1

HCID 67496549Benzyl 4-((4-(5-bromo-4-(2-ethoxy-2-oxoethyl)thiophene-2-carbonyl)-2-nitrophenyl)ethynyl)benzoate

Reagents, catalysts & solvents 3

HCID 178418476HCID 178418476, compoundCatalystHCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

A solution of 2 (952 mg, 1.82 mmol), benzyl 4-ethynylbenzoate (472 mg, 2.00 mmol), Pd(PPh3)2Cl2 (128 mg, 0.18 mmol), K2CO3 (250 mg, 1.81 mmol), and Et3N (238 mg, 2.36 mmol) in DMF (4 mL) was stirred for 24 hours at room temperature. Water (5 mL) was added to the mixture and then extracted with EtOAc (3×30 mL). The combined organic layer was washed with brine, dried over MgSO4, and concentrated in vacuo. MPLC purification (Hex:EtOAc/5:1) of the residue gave 3 as a solid foam (600 mg, 52%). 1H NMR (400 MHz, CDCl3) δ 8.55 (s, 1H), 8.11-8.06 (m, 3H), 7.87 (d, J=8.0 Hz, 1H), 7.68 (d, J=8.0 Hz, 2H), 7.52 (s, 1H), 7.47-7.34 (m, 5H), 5.38 (s, 3H), 4.19 (q, J=7.2 Hz, 2H), 3.67 (s, 2H), and 1.28 (t, J=7.2 Hz, 3H); 13C NMR (100 MHz, CDCl3) δ 183.86, 169.64, 165.88, 149.62, 142.04, 137.57, 136.41, 135.95, 135.92, 135.39, 133.02, 132.40, 131.08, 130.02, 129.93, 128.91, 128.66, 128.55, 126.69, 125.60, 124.44, 122.06, 99.57, 84.06, 67.32, 61.77, 35.25, and 14.42.

Workup

  1. extractionextracted with EtOAc (3×30 mL)
  2. washThe combined organic layer was washed with brine
  3. dry with materialdried over MgSO4
  4. concentrationconcentrated in vacuo
  5. customMPLC purification (Hex:EtOAc/5:1) of the residue

Sources & evidence

ORD record
ord-de6d16e9d9fb4e06b0ce4613e05278fa
Source dataset
uspto-grants-2013_03
Patent number
US08404728B2

Reaction notes

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