Mercanton, Roger published the artcileBromonaphthalenesulfonic acids, Category: bromides-buliding-blocks, the publication is Helvetica Chimica Acta (1945), 533-9, database is CAplus.
4-Amino-2-naphthalenesulfonic acid gives by the Sandmeyer reaction 71% Na 4-bromo-2-naphthalenesulfonate (I) (Ag salt, 86% yield, Me ester m. 132° (all m.ps. corrected), Et ester m. 90°, acid chloride m. 112.5°, amide m. 183-5°, anilide m. 172°). Similarly is obtained 74% Na 5-bromo-2-naphthalenesulfonate (II) (Ag salt, 96% yield, Me ester m. 110°, Et ester m. 125°, acid chloride m. 100°, amide m. 225°, anilide m. 207.5°). All derivatives of II are less soluble than those of I. The reaction gives 61% K 8-bromo-2-naphthalenesulfonate (III) (Ag salt, 88% yield, Me ester m. 97°, Et ester m. 92.5°, acid chloride m. 120-1.5°, amide m. 193°, anilide m. 170°), and 70% K 2-bromo-1-naphthalenesulfonate (IV) (Ag salt, 87% yield, Me ester m. 93°, Et ester m. 65.5°, acid chloride m. 98°, amide m. 145°, anilide m. 144°). Treatment of the acid chlorides with NaHSO3 and NaOH gives bromonaphthalenesulfinic acids which with HgCl2 form bromonaphthylmercuric chlorides. When these are refluxed with Br and KBr in EtOH they form dibromonaphthalenes, I giving the 1,3-, II the 1,6-, III the 1,7-, and IV the 1,2-dibromides.
Helvetica Chimica Acta published new progress about 52358-73-3. 52358-73-3 belongs to bromides-buliding-blocks, auxiliary class Bromide,Naphthalene, name is 1,3-Dibromonaphthalene, and the molecular formula is C10H6Br2, Category: bromides-buliding-blocks.
Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary