M. V. Vovk, O. V. Kushnir, V. A. Sukach and I. F. Tsymbal, Heterocyclization of functionalized heterocumulenes with C,N-, C,O-, and C,S-Binucleophiles: XI. Synthesis of dialkyl 2-oxo-3,6-diaryl-1,2,3,6-tetrahydropyrimidine-4,5-dicarboxylates by cyclocondensation of 1-chlorobenzyl isocyanates with dialkyl anilinofumarates, Volume 46, Number 5, 709-715
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http://dx.doi.org/10.1134/S1070428010050209