Nouveaux diamino-3,4 phenylalcanes et leur transformation en benzimidazolemethanethiols-2
We report five o-phenylenediamines which are substituted by an aliphatic chain containing n carbon atoms (n = 4, 6, 8, 10, 12).We describe a well adapted general synthetic method using Schmidt's reaction.The diamines were then transformed into 2-benzimidazolemethanethiols and their related S-methyl derivatives which structures were checked by (1)H NMR.
Krati, Noureddine,Roizard, Denis,Brembilla, Alain,Lochon, Pierre
4-Higher alkyl-2-nitro-2'-hydroxy-3',5'-di-higher alkyl (or cumyl)-azobenzenes are made by coupling the corresponding diazotized 4-higher alkyl-o-nitroaniline with the corresponding substituted phenol. These azobenzene intermediates are used to prepare the corresponding 2H-benzotriazole UV absorber stabilizers substituted on the 5-position of the benzo ring by a higher alkyl group, preferably tert-octyl or n-dodecyl.
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(2008/06/13)
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