6-Bromo-3-pyridinecarboxaldehyde → 6-(7-(2-Fluoro-4-nitrophenoxy)thieno[3,2-b]pyridin-2-yl)nicotinaldehyde

HRID 418729

Reaction equation

HRID 418729 reaction equation
[F:1][C:2]1[CH:18]=[C:17]([N+:19]([O-:21])=[O:20])[CH:16]=[CH:15][C:3]=1[O:4][C:5]1[CH:10]=[CH:9][N:8]=[C:7]2[CH:11]=[C:12](I)[S:13][C:6]=12.Br[C:23]1[CH:30]=[CH:29][C:26]([CH:27]=[O:28])=[CH:25][N:24]=1>O1CCOCC1.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[F:1][C:2]1[CH:18]=[C:17]([N+:19]([O-:21])=[O:20])[CH:16]=[CH:15][C:3]=1[O:4][C:5]1[CH:10]=[CH:9][N:8]=[C:7]2[CH:11]=[C:12]([C:23]3[CH:30]=[CH:29][C:26]([CH:27]=[O:28])=[CH:25][N:24]=3)[S:13][C:6]=12

Participants

5

Reactant 2

HCID 117692346-Bromo-3-pyridinecarboxaldehydeHCID 594576617-(2-Fluoro-4-nitrophenoxy)-2-iodothieno[3,2-b]pyridine

Product 1

HCID 594576666-(7-(2-Fluoro-4-nitrophenoxy)thieno[3,2-b]pyridin-2-yl)nicotinaldehydeYield 52.1%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 312751,4-DioxaneSolvent

Procedure

A solution of 399 (1 g, 2.40 mmol) and 6-bromonicotinaldehyde (450 mg, 2.40 mmol) in 1,4-dioxane (10 mL) was treated sequentially with bis-trimethyl tin (500 μL, 787 mg, 2.40 mmol) and Pd(PPh3)4 (270 mg, 0.24 mmol). The reaction mixture was then heated to reflux under nitrogen overnight, cooled, and concentrated. The crude product was purified by flash chromatography using the gradient 5%-10% MeOH in DCM and subsequent trituration by MeOH, providing pure 400 (494 mg, 52% yield). 1H NMR (400 MHz, DMSO-d6) δ(ppm): 10.11 (s, 1H), 9.10 (m, 1H), 8.65 (d, 1H, J=5.2 Hz), 8.62 (s, 1H), 8.51 (d, 1H, J=8.8 Hz), 8.48 (dd, 1H, J=2.8 Hz, J=10.4 Hz), 8.38 (dd, 1H, J=2.1 Hz, J=8.2 Hz), 8.20 (m, 1H), 7.73 (t, 1H, J=9.0 Hz), 7.01 (d, 1H, J=5.5 Hz). MS (m/z): (M+1) 395.9.

Workup

  1. temperatureThe reaction mixture was then heated
  2. temperatureto reflux under nitrogen overnight
  3. temperaturecooled
  4. concentrationconcentrated
  5. customThe crude product was purified by flash chromatography

Sources & evidence

ORD record
ord-be012727d3234f2dad52814b2764ceed
Source dataset
uspto-grants-2012_01
Patent number
US08093264B2

Linked notes

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