ChemicalBook CAS DataBase List 5-Bromothiophene-2-carbaldehyde

5-Bromothiophene-2-carbaldehyde synthesis

10synthesis methods

Product Name:5-Bromothiophene-2-carbaldehyde
CAS Number:4701-17-1
Molecular formula:C5H3BrOS
Molecular Weight:191.05

98-03-3

4701-17-1

2.1.1 Synthesis of 5-bromo-2-thiophenecarboxaldehyde Under nitrogen protection, 2-thiophenecarboxaldehyde (6.0 g, 53.5 mmol) was dissolved in anhydrous chloroform (125 mL). Subsequently, N-bromosuccinimide (10.4 g, 58.9 mmol) was slowly added and the reaction mixture was stirred for 12 h at room temperature. After completion of the reaction, the mixture was extracted with chloroform (3 × 50 mL), and the organic phases were combined and washed with deionized water (2 × 50 mL). The organic layer was dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure to give the crude product. The crude product was purified by silica gel column chromatography using chloroform as eluent to afford 5-bromo-2-thiophenecarboxaldehyde as a colorless oil (10.0 g, 98% yield). 1H NMR (400 MHz, CDCl3): δ 7.20 (d, 1H, J = 4.0 Hz), 7.53 (d, 1H, J = 8.0 Hz), 9.79 (s, 1H).

98-03-3 Synthesis

98-03-3
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4701-17-1
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Yield:4701-17-1 98%

Reaction Conditions:

with N-Bromosuccinimide in chloroform at 20;

Steps:

2.1.1 Synthesis processes of BDY-3T-BDY
2.1.1
Synthesis of 5-bromo-2-thiophenecarbaldehyde
To a solution of 2-thiophenecarboxaldehyde (6.0 g, 53.5 mol) in anhydrous CHCl₃ (125 mL), N-bromosuccinimide (10.4 g, 58.9 mmol) was slowly added, and then the reaction mixture was stirred for overnight at room temperature.
The reaction mixture was extracted with CHCl₃, and the organic phase was washed with deionized water, dried over Na₂SO₄, filtered, and evaporated to dryness to give the crude product.
Column chromatography was performed on silica gel using CHCl₃ as the eluent, which affords the pure product as a colorless oil (10.0 g, 98%).
¹H NMR (400 MHz, CDCl₃): δ 7.20 (d, H, J = 4.0 Hz), 7.53 (d, H, J = 8.0 Hz), 9.79 (s, H).

References:

Tataro?lu;Al-Sehemi, Abdullah G.;?zdemir, Mehmet;?zdemir, Resul;Usta, Hakan;Al-Ghamdi, Ahmed A.;Farooq;Yakuphanoglu [Physica B: Condensed Matter,2017,vol. 519,p. 53 - 58]

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765-58-2 Synthesis