Pyrimidine derivatives and process for preparing the same
CA 1305146 C · Owner: Bogsch, Erik · Inventors: Kreidl, Janos; Stefko, Bela; Mathe, Denes
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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A b s t r a c t, The invention relates to new pyrimidine derivatives of the general formulae (Ia), (Ib) and (Ic) (Ia), (Ib), (Ic), - 2 -, wherein, R stands for an alkyl group with 1 to 6 carbon atoms or an aryl group optionally substituted by halogen atom; and, X stands for chlorine or bromine atom or an arylsulfonyloxy group optionally having one or more substituents. The new pyrimidine derivatives of the general formulae (Ia), (Ib) and (Ic) and the known pyrimidine derivative of the general formula (Id) (Id), are prepared by reacting 2,6-diamino-pyrimidine of the general formula (II), (II), - 3 -, (wherein X has the above meaning) with an acid anhydride of the general formula (III), …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted July 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 14, 2009.
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