Thioxopyrimidine in Heterocyclic Synthesis I: Synthesis of Some Novel 6-(Heteroatom-substituted)-(thio)pyrimidine Derivatives
Figure 3
(a) Packing diagram for 13 showing the C−H–-O hydrogen bonds (C−H–-O = 2.261 Å, C−H–-O = 145.5°). (b) Packing diagram for 13 showing the interactions between the layers.