Tetrahedron p. 3607 - 3612 (1990)
Update date:2022-08-02
Topics:
Arduini, A.
Brilli, A.
Pavan, F.
Pochini, A.
Ungaro, R.
Corno, C.
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).
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