Microwave promoted efficient synthesis of substituted uracils and thiouracils under solvent-free conditions
Several substituted uracils and thiouracils were synthesized in good yields by one-pot condensation reaction of methyl or ethyl β-ketoesters and urea (or thiourea) in solvent-free conditions under microwave irradiation and in short time.
Mojtahedi, Mohammad M.,Saidi, Mohammad R.,Shirzi, Jafar S.,Bolourtchian, Mohammad
New procedures for the synthesis of heterocyclic substituted and 2,4-difunctionalized pyrimidines
N-Tosyl-2-and -3-acetylpyrrols 1 or N-tosyl-2-pyrrolidone 5 were condensed with cyano compounds in the presence of triflic anhydride (Tf2O) to yield heteroarylpyrimidines. 2,4-Difunctionalized pyrimidines were obtained by reaction of the corresponding 2,4-bis(methylsulfonyl)pyrimidines with nucleophiles.
Garcia Martinez, Antonio,Herrera Fernandez, Antonio,Moreno Jimenez, Florencio,Munoz Martinez, Pablo J.,Alonso Martin, Cristina,Subramanian, Laksminarayanapuran R.
p. 7973 - 7982
(2007/10/03)
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