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RISA novel synthesis of imidazo[1,2-c]pyrimidines
سال: 2006
خلاصه:
A new method for the preparation of imidazo[1,2- c ]pyrimidines is described.
Synthesis of novel heterocyclic systems: [1,2,4] triazino [4,5-b] [1,2,4,5] tetrazines
سال: 2006
خلاصه:
Synthesis of novel heterocyclic systems: [1,2,4] triazino [4,5-b] [1,2,4,5] tetrazines
Regioselective synthesis of 3-Benzylthiazolo [3,2-a] pyrimidones and 3-Benzyl-thiazolo [3,2-c] pyrim
سال: 2006
خلاصه:
The reaction of 2-(prop-2-ynylsulfanyl)pyrimidone 1 with various iodobenzenes in the presence of a palladium catalyst leads to regioselective cyclization to 3-benzylthiazolo [3,2-a] pyrimidones 3. The reaction of ...
Synthesis of a novel heterocyclic system: Oxazolo[3,2-c]pyrimidine
سال: 2006
خلاصه:
Treatment of 2-chloro-4-propargyloxo-5-nitro-6-methylpyrimidine with conc. sulfuric acid gave a novel heterocyclic system 2,3-dihydro-3-methylene-7-methyl-8-nitro-5H-oxazolo [3,2-c]pyrimidine-5-one ( 5 )