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Information × Registration Number 0208U006512, 0108U003635 , R & D reports Title New heterosystems formation on basis of purine alkaloids derivatives popup.stage_title Head Povstyanoy Mikhail Vasilevich, Registration Date 09-12-2008 Organization Kherson national technical university popup.description2 It has been determined that on the first stage of condensation of hydrazynopurines with 1,3-diketones the corresponding monoheterylhydrazones are formed. The later under certain conditions which are determined by the usage of the initial 8-hydrazynopurine as well as substituted 1,3-diketones, provide forming of the new heterocycle ring and forming either isolated substituted 8-(1-pyrazolyl)purines, or condensed derivatives of 1,2,4-triazepineteophylines. The factors that determine the possibility of both methods of synthesis of heterocyclic substituted natural purine alkaloids have been analysed.5635 Product Description popup.authors popup.nrat_date 2020-04-02 Close