New [f]-fused xanthines: Synthesis of 1,3-dipropyl-1H,3H-pyrazino,pyrido, pyrimido and pyrrolo[2, 1-f]purine-2,4-diones |
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Authors: | Franco Gatta Maria Rosaria Del Giudice Anna Borioni Carlo Mustazza |
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Abstract: | Synthesis of 1,3-dipropyl-1H,3H-pyrazino, pyrido, pyrimido and pyrrolo2,1-f]purine-2,4-diones, starting from 5,6-diamino-1,3-dipropylpyrimidine-2,4-dione 1 and 6-chloro-1,3-dipropylpyrimidine-2,4-dione 14 is described. A new synthetic approach to 1,3-dipropyl-1H,3H-pyrido(or pyrazino)1′,2′-1,2]pyrimido4,5-d]pyrimidine-2,4,5-triones 19 e, f, h has been also developed. |
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