Hydroxyhalogenation of derivatives of C₆–C₇ cycloolefins in [MX_к–HA(HX)]–H₂O₂(NaOCl) system has been carried out, and the optimum conditions of the yield of reaction products have been found. It has been established that under relatively mild conditions induced electrofilic addition of halogen acids (HOCl, HOBr) produced by the multiple bond of the cycle, and the double bond of the side chain remains unchanged. Formation of chlorinehydrines goes on faster than that of brominehydrines. The reaction has been found to produced similarly with the participation of the solution of halogen acids prepared beforehand. The obtained compounds are quite reactive and they can be used in production of unsaturated epoxides and amino-alcohols of alicyclic acids