| Identification | More | [Name]
5-BROMO-2-HYDROXY-3-METHOXYBENZALDEHYDE | [CAS]
5034-74-2 | [Synonyms]
5-BROMO-2-HYDROXY-3-METHOXYBENZALDEHYDE
5-BROMO-2-HYDROXY-3-METHOXYBENZENECARBALDEHYDE
5-BROMO-2-VANILLIN
5-BROMO-3-METHOXYSALICYLALDEHYDE
5-BROMO-O-VANILLIN
BUTTPARK 153\33-74
OTAVA-BB BB7018802005
Benzaldehyde, 5-bromo-2-hydroxy-3-methoxy-
5-BROMO-2-HYDROXY-3-METHOXYBENZALDEHYDE 98%
3-Methoxy-5-bromosalicylaldehyde | [EINECS(EC#)]
628-660-0 | [Molecular Formula]
C8H7BrO3 | [MDL Number]
MFCD00016593 | [Molecular Weight]
231.04 | [MOL File]
5034-74-2.mol |
| Chemical Properties | Back Directory | [Appearance]
brown powder | [Melting point ]
125-127 °C (lit.) | [Boiling point ]
277.2±35.0 °C(Predicted) | [density ]
1.6494 (rough estimate) | [refractive index ]
1.4730 (estimate) | [storage temp. ]
under inert gas (nitrogen or Argon) at 2-8°C | [form ]
solid | [pka]
7.62±0.23(Predicted) | [Sensitive ]
Air Sensitive | [BRN ]
2328601 | [CAS DataBase Reference]
5034-74-2(CAS DataBase Reference) |
| Safety Data | Back Directory | [Hazard Codes ]
Xi | [Risk Statements ]
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S37/39:Wear suitable gloves and eye/face protection . | [WGK Germany ]
3
| [HS Code ]
29130000 |
| Hazard Information | Back Directory | [Chemical Properties]
brown powder | [Uses]
5-Bromo-2-hydroxy-3-methoxybenzaldehyde may be employed for the following syntheses:
- ailanthoidol, via Stille coupling
- 6-bromo-8-methoxy-3-(methoxycarbonyl)-2H-chromen-2-one
- benzimidazole-based ligand, 2-(1H-benzoimidazol-2-yl)-4-bromo-6-methoxy-phenol (HL)
- chromogenic reagent, 5-bromo-2-hydroxy-3-methoxybenzaldehyde-p-hydroxy benzoic hydrazone
- (E)-N′-(5-bromo-2-hydroxy-3-methoxybenzylidene)-2-hydroxybenzohydrazide monohydrate
| [Synthesis]
To a solution of o-vanillin (11; 4.0 g, 0.026 mol) in acetic acid (80 mL) was added sodium acetate (2.37 g, 0.029 mol) at 0 °C, followed by slow dropwise addition of bromine (1.49 mL, 0.029 mol). The reaction mixture was stirred at room temperature for 30 min. After completion of the reaction, water (100 mL) was added and the aqueous phase was extracted with dichloromethane (3 x 80 mL). The organic phases were combined, washed sequentially with water (100 mL) and brine (50 mL), dried over anhydrous magnesium sulfate, and concentrated under reduced pressure to remove the solvent. The crude product was purified by fast column chromatography (petroleum ether:ethyl acetate = 19:1) to afford 5-bromo-2-hydroxy-3-methoxybenzaldehyde (26; 6.0 g, 98%) as a yellow solid with a melting point of 119-123 °C (literature value 19: 122-124 °C).1H NMR (400 MHz, CDCl3/TMS): δ = 3.92 (3H, s, OCH3), 7.18 (1H, d, J = 2.4 Hz, 4-H), 7.31 (1H, d, J = 2.4 Hz, 6-H), 9.86 (1H, s, CHO), 11.00 (1H, s, OH).13C NMR (100 MHz, CDCl3): δ = 56.3 (OCH3), 111.1 (C-5), 120.8 (C-6), 121.3 (C-1), 126.1 (C-4), 149.3 (C-2), 150.9 (C-3), 195.4 (CHO).The 1H NMR and 13C NMR data are in agreement with the literature values19. | [References]
[1] Synthesis (Germany), 2017, vol. 49, # 6, p. 1190 - 1205
[2] Journal of the Iranian Chemical Society, 2011, vol. 8, # 2, p. 531 - 536
[3] Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1990, p. 503 - 508
[4] Chemische Berichte, 1986, vol. 119, # 4, p. 1374 - 1399
[5] Journal of the Chemical Society. Perkin Transactions 2, 2000, # 6, p. 1119 - 1123 |
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