76996-62-8

Upstream product

• 129453-05-0 8-bromo-2-naphthalenesulfonic acid sodium salt 
• 119-28-8 8-amino-2-naphthalenesulfonic acid 
• 129453-06-1 5,5'-methylenbis-8-bromo-2-naphthalensulfonic acid 
• 50-00-0 formaldehyd 
• 120-18-3 naphthalene-2-sulfonate 

Relevant academic research and scientific papers

Synthesis and structural characterization of regiocontrolled oligomers from 2-naphthalensulfonic acid and formaldehyde

Regiocontrolled synthesis of symmetrical dinuclear products 4 and 8 derived from condensation of 2-naphthalensulfonic acid and formaldehyde was afforded. Acid catalyzed reaction of 4 with formaldehyde gave a mixture of regiocontrolled oligomers with even number of naphthalenic nucleus from which tetranuclear 9 and hexanuclear 10 products were separated. NMR Studies of all these products were carried out, obtaining both the structural characterization and useful informations for the identification of more complex mixtures.

METHYLENE BRIDGE POSITION IN 2-NAPHTHALENSULFONIC ACID-FORMALDEHYDE CONDENSATION PRODUCTS: A NMR INVESTIGATION

Low molecular weight oligomers from acid catalyzed condensation of 2-naphthalensulfonic acid and formaldehyde were obtained.Spectroscopic (NMR) studies of dinuclear mixture verified the presence of 5,5'- 8,8'- and 5,8'-methylenebis-2-naphthalensulfonic acid, with a predominance of products derived from 5-attack.Trinuclear product confirmed the presence of a linear structure of these condensate.Similar results were also obtained from dinuclear product separated from commercial product (Daxad 15-Grace).