A Convenient Synthesis of N1-Substituted 3,4-Dihydropyrimidin-2(1<i>H</i>)-ones by Cyclocondensation of α-Chlorobenzyl Isocyanates with Ethyl <i>N</i>-alkyl(aryl)-β-aminocrotonates
A new convenient approach to the synthesis of N1-sub-stituted 3,4-dihydropyrimidin-2(1H)-ones was developed using the regioselective cyclocondensation of α-chlorobenzyl isocyanates with ethyl N-alkyl(aryl)-β-aminocrotonates. A number of Nl-aryl and N1-alkyl substituted Biginelli compounds difficult to obtain by other methods were prepared with high yields.
Compounds having the formula I wherein A, m and R
1
are herein defined are Hepatitis C virus polymerase inhibitors. Also disclosed are compositions and methods for treating diseases mediated by HCV and for inhibiting hepatitis replication. Also disclosed are processes for making the compounds and synthetic intermediates used in the process