Di-tert-butyl dicarbonate（CAS NO 24424-99-5）
Specification:
Item | Specification |
CAS NO | 24424-99-5 |
Molecular formular | C10H18O5 |
Molecular weight | 218.25 |
Linear formula | [(CH3)3COCO]2O |
EINECS NO | 246-240-1 |
State | White,low melting crystalline solid,high melting liquid |
Density（g/mL,25/4℃） | 0.95 g/mL at 25 °C(lit.) |
Melting Point（ºC） | 22-24 |
Boiling Point | 65-67 °C |
Refractive index | 1.4075-1.4095 |
Flash Point（ºC） | 37 |
Preparation:
Commonly used di-tert-butyl dicarbonate is 70% toluene or tetrahydrofuran solution. There are two main preparation methods: chemical companies in China and India mostly use tert-butanol, carbon dioxide and phosgene to react under the action of DABCO to produce di-tert-butyl dicarbonate. European and Japanese chemical companies mostly use sodium tert-butoxide and carbon dioxide to react under the catalysis of p-toluenesulfonic acid or methanesulfonic acid to prepare di-tert-butyl dicarbonate. The di-tert-butyl dicarbonate obtained by the latter method has higher purity.
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