Fibre-reactive Groups Reacting by Nucleophilic Addition

Fibre-reactive Groups Reacting by Nucleophilic Addition 

There are relatively few other reactive groups which react by nucleophilic addition and which have achieved significant commercial success. However, one particular system which is worthy of note is the a-bromoacrylamido group, found in the Lanasol dyes (Ciba), which are among the most widely used reactive dyes for wool. The chemistry 

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The most important reactive dyes in commercial use for application to cellulosic fibres in which the fibre-reactive groups react by nucleophilic addition are the Remazol reactive dyes. These dyes, based on the vinylsulfone reactive group, were introduced by Hoechst soon after the launch of the Procion dyes based on the triazine system by The chemistry of the process in which vinylsulfone... 

There are relativefy few other reactive groups reacting by nucleophilic addition that have achieved significant commercial exploitation. However, some systems are worthy of note in reactive dyes for protein fibres, such as wool and silk. The protein that constitutes the fibre contains amino and thiol groups, both of which are excellent nucleophiles. Some reactive dyes used for wool are similar chemically to those used for cellulosic fibres, for example based on nucleophilic substitution with monochlorotriazines and chlorodifluorop3nimidines, but... 

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