中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
2,4-二氯苄醇 | (2,4-dichlorophenyl)methanol | 1777-82-8 | C7H6Cl2O | 177.03 |
2,4-二氯-1-[(乙氧基甲氧基)甲基]苯 | 2,4-dichloro-1-[(ethoxymethoxy)methyl]benzene | 1058649-24-3 | C10H12Cl2O2 | 235.11 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
2,4-二氯苄醇 | (2,4-dichlorophenyl)methanol | 1777-82-8 | C7H6Cl2O | 177.03 |
2,2',4,4'-四氯联苯甲基醚 | 2,2',4,4'-Tetrachlorodibenzyl ether | 207974-13-8 | C14H10Cl4O | 336.045 |
Structurally diverse alcohols and phenols were trimethylsilylated in a clean and efficient reaction with hexamethyldisilazane (HMDS) based on the use of a catalytic amount of N-bromosuccinimide under both dichloromethane and solvent-free conditions at room temperature. Deprotection of trimethylsilyl ethers was also be achieved efficiently in the presence of a catalytic amount of NBS in methanol at ambient temperature.Key words: N-bromosuccinimide, solvent-free, alcohols, phenols, hexamethyldisilazane, trimethylsilyl ether, catalyst, detrimethylsilylation.
A very efficient procedure for the protection of alcohols and phenols is presented. The mixture of 1,1,1,3,3,3-hexamethyldisilazane (HMDS) and catalytic amounts of poly(4-vinylpyridinium tribromide) was found to be effective for the trimethylsilylation of alcohols and phenols. Protection reaction is very simple and performs heterogeneously in acetonitrile at room temperature under mild conditions.