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2005
Pyrimidine derivatives
R 0510
Synthesis of Indole Derivatives of 2-Thioxodihydro-4,6(1H,5H)-pyrimidinedione.
Cyclocondensation of diester (I) with thiourea derivatives (II) provides access to the
24- 145 —
less stable sodium salts of phenylskatyl-substituted barbituric acid derivatives (III)
which are stabilized by alkylation. It is shown that the order of nucleophilicity in the
alkylation of compound (IIIa) is S > N > O, as alkylation provides (Va) first, followed
by (VI) and (VII). — (SEMENOV, B. B.; LEVINA, I. I.; KRASNOV, K. A.;
Khim.-Farm. Zh. 39 (2005) 1, 29-33; Mendeleev Univ. Chem. Technol., Moscow
125047, Russia; Russ., Abstr. Eng.) — Mischke
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