2-Chloro-3-methyl-5-bromopyridine synthesis
- Product Name:2-Chloro-3-methyl-5-bromopyridine
- CAS Number:29241-60-9
- Molecular formula:C6H5BrClN
- Molecular Weight:206.47
89488-30-2
237 suppliers
$7.00/1g
29241-60-9
268 suppliers
$6.00/1g
Yield:29241-60-9 78%
Reaction Conditions:
with trichlorophosphate in dichloromethane;N,N-dimethyl-formamide
Steps:
11.B 5-bromo-2-chloro-3-methylpyridine
EXAMPLE 11B 5-bromo-2-chloro-3-methylpyridine The product from Example 11A (4.1 g, 221.8 mmol) in DMF (40 mL) was treated with phosphorus oxychloride (10 g, 65.4 mmol) dropwise at 0° C. After heating at 120° C. for 2 hours, the mixture was cooled and poured onto ice/water. The mixture was made basic with NH4OH, filtered, and the filtercake washed with ice water. The obtained solid was dissolved in dichloromethane (100 mL), washed with brine, and dried (MgSO4). The dried solution was filtered through a pad of silica using dichloromethane and the filtrate concentrated to provide the title compound as a white solid (3.48 g, 78% yield): 1H NMR (CDCl3, 300 MHz) δ 2.39 (s, 3H), 7.70 (m, 1H), 8.31, d, J=3 Hz, 1H).
References:
Schrimpf, Michael R.;Tietje, Karin R.;Toupence, Richard B.;Ji, Jianguo;Basha, Anwer;Bunnelle, William H.;Daanen, Jerome F.;Pace, Jennifer M.;Sippy, Kevin B. US2002/19388, 2002, A1
22280-56-4
270 suppliers
$6.00/1g
29241-60-9
268 suppliers
$6.00/1g
38186-82-2
188 suppliers
$6.00/1g
29241-60-9
268 suppliers
$6.00/1g