How is 4-[(3-Nitrophenyl)sulfonyl]morpholine (CAS: 91619-33-9) typically synthesized?

4-[(3-Nitrophenyl)sulfonyl]morpholine (CAS: 91619-33-9) is typically synthesized via a multi-step process, starting with morpholine and 3-nitrophenylsulfonyl chloride. The reaction involves the substitution of a morpholine ring with a 3-nitrophenylsulfonyl group. The yield is generally around 80-85%, and the reaction is typically performed under anhydrous conditions to avoid hydrolysis. Anhydrous solvents like pyridine are commonly used as catalysts.