Reacción #2307978
ord-847c83d686c44a23960d69a3e7b645da
Ecuación de reacción
Reactantes
Reactivos
Disolventes
Condiciones de reacción
Tratamiento posterior
- 1Otroremoved
- 2OtroThe phosgene, EtOAc, and toluene were removed by vacuum distillation
Procedimiento
Monodispersed activated hexaethylene glycol monomethyl ether was prepared analogously to that of monodispersed triethylene glycol in Example 14 above. A 20% phosgene in toluene solution (35 mL, 6.66 g, 67.4 mmol phosgene) was chilled under a N2 atmosphere in an ice/salt water bath. Monodispersed hexaethylene glycol (1.85 mL, 2.0 g, 6.74 mmol) was dissolved in 5 mL anhydrous EtOAc and added to the phosgene solution via syringe. The reaction mixture was kept stirring in the ice bath for one hour, removed and stirred a further 2.5 hours at room temperature. The phosgene, EtOAc, and toluene were removed by vacuum distillation, leaving monodispersed methyl hexaethylene glycol chloroformate as a clear, oily residue.