A Convenient Synthesis of N1-Substituted 3,4-Dihydropyrimidin-2(1H)-ones by Cyclocondensation of α-Chlorobenzyl Isocyanates with Ethyl N-alkyl(aryl)-β-aminocrotonates - Sukach, Volodymyr A; Bol’but, Andriy V; Sinitsa, Anatoliy D; Vovk, Mykhaylo V (Synlett, 2006)