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ChemicalBook--->CAS DataBase List--->120935-94-6

120935-94-6

120935-94-6 Structure

120935-94-6 Structure
IdentificationBack Directory
[Name]

METHYL 4-BROMO-2,5-DIMETHYL-1H-PYRROLE-3-CARBOXYLATE
[CAS]

120935-94-6
[Synonyms]

METHYL 4-BROMO-2,5-DIMETHYL-1H-PYRROLE-3-CARBOXYLATE
4-Bromo-2,5-dimethyl-1H-pyrrole-3-carboxylic acid methyl ester
1H-Pyrrole-3-carboxylic acid, 4-bromo-2,5-dimethyl-, methyl ester
[Molecular Formula]

C8H10BrNO2
[MDL Number]

MFCD00203873
[MOL File]

120935-94-6.mol
[Molecular Weight]

232.07
Chemical PropertiesBack Directory
[Boiling point ]

344.5±37.0 °C(Predicted)
[density ]

1.503±0.06 g/cm3(Predicted)
[storage temp. ]

2-8°C
[pka]

15.20±0.50(Predicted)
Safety DataBack Directory
[Hazard Codes ]

Xi
[Hazard Note ]

Irritant
Hazard InformationBack Directory
[Synthesis]

METHYL 2,5-DIMETHYLPYRROLE-3-CARBOXYLATE

69687-80-5

METHYL 4-BROMO-2,5-DIMETHYL-1H-PYRROLE-3-CARBOXYLATE

120935-94-6

Methyl 2,5-dimethyl-1H-pyrrole-3-carboxylate (6.85 g, 45.0 mmol) was used as a raw material and was mixed with triethylamine (8.7 mL, 63.0 mmol) and dichloromethane (270 mL). Pyridinium bromide (15.7 g, 15.7 mmol) was added to the mixture in batches at 0 °C. The reaction mixture was stirred at 0 °C for 2 h before being poured into brine and extracted with ethyl acetate. The organic layers were combined, dried with anhydrous magnesium sulfate and subsequently concentrated under reduced pressure. The crude product was purified by silica gel column chromatography (eluent: hexane-ethyl acetate). The final product, methyl 4-bromo-2,5-dimethyl-1H-pyrrole-3-carboxylate, was recrystallized by hexane-ethyl acetate to give yellow crystals (7.59 g, 92% yield).1H NMR (300 MHz, CDCl3) δ: 2.19 (3H, s), 2.47 (3H, s), 3.82 (3H, s), 8.20 (1H, s).

[References]

[1] Bioorganic and Medicinal Chemistry, 2012, vol. 20, # 1, p. 422 - 434
[2] Journal of Medicinal Chemistry, 1993, vol. 36, # 19, p. 2739 - 2744
[3] Patent: EP1466902, 2004, A1. Location in patent: Page 31
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