Regioselective synthesis and antibacterial evaluation of novel bis-pyrimidine derivatives via a three-component reaction
作者:Nosrat O. Mahmoodi、Sajede Shoja、Bahman Sharifzadeh、Mehdi Rassa
DOI:10.1007/s00044-013-0731-0
日期:2014.3
A series of novel bis-2-phenylpyrimidines with alkyl linkages have been prepared by a three-component cyclo-condensation of benzamidine hydrochloride, beta-ketoester, and dihaloalkanes. The easy work-up of the products, rapid reaction, and mild conditions are notable features of this protocol. The reaction was efficiently catalyzed in one-pot by K2CO3 as a base in N,N-dimethylformamide under optimized temperature (70 A degrees C) conditions providing the title compounds in moderate to high yields. The antibacterial activities of the selected products were evaluated against some strains of Gram-positive and Gram-negative bacteria. Biological data indicated that some products exhibit promising activities.
Ultrasound-promoted one-pot five-components synthesis of biologically active novel bis((6-alkyl or phenyl-2-phenylpyrimidine-4-yl) oxy) alkane or methyl benzene derivatives
We have described a synthesis of novel five-component reaction (5-CR) of bis((6-alkyl or phenyl-2-phenylpyrimidine-4-yl) oxy) alkane or methyl benzene derivatives under ultrasound irradiation. A useful ultrasound effect was observed and title products were obtained with high yields after 25-40 min sonication. Structural confirmation and characterization of the products based on the analytical, chemical