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1H and 13C Nmr Determination of Polysubstituted Diphenylmethane Dimers Mechanism of Their Formation by Reduction of Polymethoxylated Benzophenones |
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| Authors: | Christophe Waterlot Daniel Couturier Marc Debacker Benoît Rigo |
| Institution: | 1. Laboratoire d'Ingéniérie Moléculaire , Université des Sciences et Technologies de Lille , 59655, Villeneuve d'Ascq, France;2. LASIR-HEI, UMR 8516 , 13 rue de Toul, 59046, Lille, France;3. Laboratoire d'Ingéniérie Moléculaire, Ecole des Hautes Etudes industrielles , 13 rue de Toul, 59046, Lille, France |
| Abstract: | Reduction of substituted benzophenones 1 with sodium borohydride and trifluoro-acetic acid yields diphenylmethanes 3 as well as dimers 5 and 6. the complete structure of these substituted diphenylmethane dimers 5 may be accurately determined by 1H, 13C, 2D NMR analysis, and a mechanism for their formation is suggested. |
| Keywords: | 11-Chloro-2 5 15 18-tetramethoxy-17-(24-chlorobenzyl)triphenyl methane 11-bromo -2 5 15 18-tetramethoxy-17-(24-bromobenzyl)triphenyl methane diphenylmethane benzophenone benzhydrol benzofluorene reduction sodium borohydride trifluoroacetic acid 1H 13C NMR 2D NMR |