1998 organo-phosphorus compounds, isocyclic C derivatives

organo-phosphorus compounds, isocyclic C derivativesS 0084

42 - 164Reactions of Sterically Hindered Phenols with P2S5. — Thephosphorylation of sterically hindered phenols is shown to depend on the extendof shielding of the hydroxyl group. While the 2,6-di-tert-butyl(phenyl)phenols(I) react at the para-position to afford C-phosphorylated products (II), the2,6-dimethylphenol (III) is phosphorylated at the hydroxyl group. In the4-hydroxy-2,6-di-tert-butylphenol (V), the non-shielded hydroxyl group isinvolved in the reaction. — (DZHANIBEKOV, N. F.; MARKOVA, E. I.;MAMEDOV, M. KH.; RAFIEVA, S. R.; Izv. Akad. Nauk, Ser. Khim. (1998)7, 1442-1444; Inst. neftekhim. protsessov Akad. nauk Azerb. Resp., Baku370025, Azerbaijan; RU)

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