456-55-3, name is (Trifluoromethoxy)benzene, belongs to ethers-buliding-blocks compound, is considered to be a conventional heterocyclic compound, which is widely used in drug synthesis. The chemical synthesis route is as follows. Quality Control of (Trifluoromethoxy)benzene
Example 1 4-Bromomethyl-1-trifluoromethoxybenzene 300 g of trifluoromethoxybenzene, 111 g of paraformaldehyde, 456 g of sodium bromide, and 900 ml of glacial acetic acid were initially charged and heated at 90 C. To release hydrogen bromide, a mixture of 450 ml of glacial acetic acid and 678 g of concentrated sulfuric acid was then added dropwise. After the addition had ended, the reaction mixture was stirred at 90 C. for 20 hours. The reaction mixture was then poured onto 1,000 g of ice and extracted twice with in each case 300 ml of methyl tert-butyl ether. The combined organic extracts were washed with 100 ml of water and concentrated. The residue was distilled at 20 hPa in a spinning band column. This gave 324.3 g of 4-bromomethyl-1-trifluoromethoxybenzene as a colorless liquid (60% of theory) of b.p. 82-83 C.
The synthetic route of 456-55-3 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; Marhold, Albrecht; Muller, Peter; US2002/82454; (2002); A1;,
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