Methanesulfonic anhydride Cas 7143-01-3

Organic Synthesis (Sulfonylating Reagent): Used to prepare mesylates as an alternative to methanesulfonyl chloride; employed for the mesylation of alcohols and phenols and the activation of hydroxyl groups in intermediates; widely used in the synthesis of pharmaceutical intermediates.
Pharmaceutical Fine Chemicals: Used in the synthesis of sulfonamides and heterocyclic API intermediates; offers mild sulfonation conditions and minimal by-product formation, making it suitable for processes sensitive to chlorides.
Organocatalysis: Functions as a dehydrating agent, an acidic promoter, and an auxiliary for certain oxidation reactions.
Agrochemicals and New Materials: Used as an intermediate for sulfonyl-based pesticides and monomers for specialty polymers.