Abstract Synthesis and antihyperlipidemic activity of a series of novel condensed 2- chloroalkyl-4-chloro/hydroxy-5, 6-di-substituted pyrimidines are described. The design of these compounds is based on the earlier QSAR study on the antihyperlipidemic 2- substituted methylthienopyrimidin-4-ones. The newly synthesized condensed 4-chloro-2- chloroalkylpyrimidines (IIIa-n) have exhibited much superior antihyperlipidemic activity, ...