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4,4'-Dimethoxytrityl chloride

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4,4'-Dimethoxytrityl chloride Basic information
4,4'-Dimethoxytrityl chloride Chemical Properties
  • Melting point:123-125 °C
  • Boiling point:455.07°C (rough estimate)
  • Density 1.0887 (rough estimate)
  • refractive index 1.5330 (estimate)
  • storage temp. Store at 0°C
  • form Powder
  • color Pink
  • Water Solubility Soluble in chloroform and methanol. Partially soluble in water
  • Sensitive Moisture Sensitive
  • BRN 2471942
  • CAS DataBase Reference40615-36-9(CAS DataBase Reference)
  • NIST Chemistry ReferenceMethane, chlorobis(p-methoxyphenyl)phenyl-(40615-36-9)
Safety Information
4,4'-Dimethoxytrityl chloride Usage And Synthesis
  • Chemical Properties4,4'-Dimethoxytrityl chloride is pink powder
  • Uses4,4'-Dimethoxytrityl chloride is a versatile protecting group for primary alcohols, specially useful in oligonucleotide synthesis
  • Purification MethodsDMT crystallises from cyclohexane/acetyl chloride as the hydrochloride. Dry it over KOH pellets in a desiccator. When dissolved in *C6H6 and air is blown through, HCl is removed. It crystallises from Et2O. [Baeyer & Villiger Chem Ber 36 2788 1903, Smith et al. J Am Chem Soc 84 430 1962, Smith et al. J Am Chem Soc 85 3821 1963.] Ifit has hydrolysed considerably (see OH in IR), then repeat the crystallisation from cyclohexane/acetyl chloride — excess of AcCl is removed in a vacuum over KOH, then recrystallise it from Et2O. [Beilstein 6 IV 1042.]
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