Functionalisation of lyocell. Part 2: Synthesis of 6‐p‐aminoanilino‐4‐p‐(β‐sulphatoethylsulphonyl)anilino‐1,3,5‐triazin‐2(1H)‐one†

A new water‐soluble monomeric agent for the aminisation of lyocell has been designed and synthesised. The agent, which contains a sulphatoethylsulphonyl group, an s ‐triazinyl keto–enol tautomeric system and a primary aromatic amine was prepared in acidic media, in good yield from cyanuric chloride, p ‐aminophenyl‐β‐sulphatoethylsulphone and p ‐phenylenediamine, via a triazinyl betaine intermediate.