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Synthesis of truncated substituted uracil carbocycles. Conditions: (a) NaBH4, MeOH, CeCl3·7H2O, r.t., 1 hour, yield: 93%; (b) N3-benzoyluracil or N3-benzoyl-5-bromouracil, DPPE, DIAD, acetonitrile, r.t., 18 hours, for 7 yield: 78%; for 8 yield: 70%; and (c) methanolic ammonia, r.t., 12 hours, for 9 yield: 62%; for 10 yield: 99%.
