2,5-Dibromo-3-methylpyridine
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2,5-Dibromo-3-methylpyridine
structure -
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CAS No:
3430-18-0
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Formula:
C6H5Br2N
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Chemical Name:
2,5-Dibromo-3-methylpyridine
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Synonyms:
Pyridine,2,5-dibromo-3-methyl-;3-Picoline,2,5-dibromo-;2,5-Dibromo-3-methylpyridine;2,5-Dibromo-3-picoline
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CAS No:
Characteristics
12.9
2.9
Off-white to beige crystalline powder
1.9±0.1 g/cm3
41-42 °C
260°C at 760 mmHg
111.1±25.9 °C
1.594
Safety Information
Ⅲ
6.1
2811
3
6.1
S26-S36/37/39
Xn: Harmful;
P280-P301 + P310-P305 + P351 + P338
H301-H315-H318
|Danger|H301 (40%): Toxic if swallowed [Danger Acute toxicity, oral]|P261, P264, P270, P271, P280, P301+P310, P302+P352, P304+P340, P305+P351+P338, P310, P312, P321, P330, P332+P313, P337+P313, P362, P403+P233, P405, and P501|Aggregated GHS information provided by 100 companies from 9 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
2,5-Dibromo-3-methylpyridine Use and Manufacturing
2, 5-Dibromo-3-methylpyridine (49) [0175] (J. Med. Chem. 2007, 50, 3730-3742.) 5-Bromo-3-methylpyridin-2-amine (48, 69 g, 0.37 mol) was suspended in hydrobromic acid (200 mL, 48percent in water), and the mixture was cooled to −15° C. Bromine (95 g, 0.59 mol) was added dropwise to the mixture, followed by addition of sodium nitrite (69 g, 1 mol) in water (100 mL). Temperature of the reaction mixture was kept below −15° C. during addition. After addition, the cooling bath was removed and the reaction mixture was stirred for 3 h. The reaction mixture was cooled to −15° C. and quenched with potassium hydroxide (112 g, 2 mol) in water (500 mL). The cooling bath was removed, and the mixture was stirred for 1.5 h. The products were extracted with ethyl acetate (3×300 mL). The combined extracts were washed with water (2×200 mL), saturated aqueous sodium bicarbonate (200 mL), dried with sodium sulfate, and evaporated to dryness. The oily residue was redissolved in chloroform (100 mL), and the solution was filtered through a pad of silica gel, washing with chloroform. The combined filtrates were evaporated to provide 49 as light-yellow solid (87 g, 94percent): mp 38-40° C. (lit. (Recl. Tray. Chim. Pays-Bas 1965, 84, 951-964) mp 41-42° C.).
Computed Properties
Molecular Weight:250.92
XLogP3:2.9
Hydrogen Bond Acceptor Count:1
Exact Mass:250.87682
Monoisotopic Mass:248.87887
Topological Polar Surface Area:12.9
Heavy Atom Count:9
Complexity:97.1
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes
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