OXIDATIVE REACTIONS OF AZINES .1. KETOHYDROXYLATION OF 4-PHENYL-1,2,5,6-TETRAHYDROPYRIDINES. SYNTHESIS AND STRUCTURE OF 3,4-DIHYDROXY-4-PHENYLPIPERIDIN-2-ONES AND THEIR ACETOXY DERIVATIVES ArticleSoldatenkov A.T., Bekro I.A., Mamyrbekova Z.A., Soldatova S.A., Temesgen A., Sergeeva N.D., Kuleshova L.N., Khrustalev V.N.Chemistry of Heterocyclic Compounds / KHIMIYA GETEROTSIKLICHESKIKH SOEDINENII. 1996. P.. 222-226