Sodium 1-naphthalenesulfonate, formation

Of-Naphthoic acid has been prepared by the hydrolysis of a-naphthyl cyanide and (in poor yield) by the fusion of sodium a-naphthalenesulfonate and sodium formate. It has also been prepared by passing carbamyl chloride into naphthalene and aluminum chloride and hydrolyzing the a-napthamide thus formed.3... 

Meinwald et al. (76JA6643) described reactions with sodium hydroxide and lithium phenylamide leading to the formation of sodium 1-naphthalenesulfonate (69) and 1-naphthalenesulfonamide (70), respectively. Again, the negatively charged fragment of the reagent attacks the sulfur atom, followed by protonation of the atom of the naphthalene core (Scheme 13). 

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