Abstract:Synthesis of Pyrimidines from Isoxazole Derivatives.-Ten pyrimidine derivatives of type (III) are obtained by ring cleavage of isoxazoles with 2-methyl-3-arylisothioureas. Their structures are confirmed by X-ray analysis of (IIIa) (space group P21/n; Z = 4). Strong hydrogen bonds between NH, OH, and keto groups are observed. -(BOSSIO, R.; MARCACCINI, S.; PAOLI, P.; PELLEGRINI, G.; PEPINO, R.; TORROBA, T.; J.
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