Methanesulfonic anhydride

CAS: 7143-01-3
Molecular Formula: C2H6O5S2
Molecular Weight: 174.196
Product description:White crystal ribbed. Melting point 71 ℃, boiling point 138 ℃ (1.33 kPa), soluble in chloroform, benzene, ether.The phosphorus pentoxide 300 g and 300 g diatomite mix, take its half, add 305 g methyl sulfonic acid under stirring and 10 g a mixture of asbestos, when reaction to slow in 80 ℃ heating 2.5 h, then add in the other half phosphorus pentoxide diatomite, reheat 3 h. Reaction mixture extracted by dichloromethane, evaporate solvent, vacuum distillation, collected 105-109 ℃ fraction (0.133 kPa), 193 g crude products, through the ether - benzene recrystallization, 143 g methanesulfonic acid anhydride finished products. Yield of 55%.The catalyst used in organic synthesis.