Identification | Back Directory | [Name]
5-(BROMOMETHYL)-2,3-DIHYDRO-1,4-BENZODIOXINE,97% | [CAS]
214894-89-0 | [Synonyms]
5-(bromomethyl)-2,3-dihydro-1,4-Benzodioxin 5-(Bromomethyl)-2,3-dihydro-1,4-benzodioxine 1,4-Benzodioxin, 5-(bromomethyl)-2,3-dihydro- 5-(bromomethyl)-2,3-dihydrobenzo[b][1,4]dioxine 5-(BROMOMETHYL)-2,3-DIHYDRO-1,4-BENZODIOXINE,97% | [Molecular Formula]
C9H9BrO2 | [MDL Number]
MFCD05664400 | [MOL File]
214894-89-0.mol | [Molecular Weight]
229.07 |
Chemical Properties | Back Directory | [Boiling point ]
295.7±29.0 °C(Predicted) | [density ]
1.549±0.06 g/cm3(Predicted) | [storage temp. ]
under inert gas (nitrogen or Argon) at 2-8°C |
Hazard Information | Back Directory | [Synthesis]
The general procedure for the synthesis of 5-bromomethyl-2,3-dihydro-1,4-benzodioxole from (2,3-dihydrobenzo[b][1,4]dioxin-5-yl)methanol was as follows: (2,3-dihydrobenzo[b][1,4]dioxin-5-yl)methanol (3.75 g, 32.3 mmol) was dissolved in ethyl ether (80 mL) and the solution was cooled to 0 °C. Phosphorus tribromide (3.67 mL, 38.8 mmol) was added slowly and dropwise with stirring. The reaction mixture was continued to be stirred at 0 °C for 10 minutes, then brought to room temperature and stirred for 1 hour. Upon completion of the reaction, water (10 mL) was carefully added to quench the excess phosphorus tribromide. The mixture was diluted with ether and washed with water (3 x 50 mL). The combined organic layers were washed with brine (100 mL), dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure to afford 5-bromomethyl-2,3-dihydro-1,4-benzodioxole as a brown solid (4.61 g, 62% yield). The product was characterized by 1H NMR (CDCl3): δ 6.91-6.77 (m, 3H), 4.52 (s, 2H), 4.35-4.33 (m, 2H), 4.29-4.27 (m, 2H). Mass spectrum measured value: [M + H-Br] = 149.5. | [References]
[1] Patent: WO2017/155909, 2017, A1. Location in patent: Paragraph 0076 [2] Bioorganic and Medicinal Chemistry, 2018, vol. 26, # 8, p. 1797 - 1809 |
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Energy Chemical
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