作者:A. A. Harutyunyan、G. A. Panosyan、S. G. Chishmarityan、R. A. Tamazyan、A. G. Aivazyan、R. V. Paronikyan、H. M. Stepanyan、R. S. Sukasyan、A. S. Grigoryan
DOI:10.1134/s107042801505022x
日期:2015.5
Heating a mixture of substituted malonic esters and 6-methoxy-1,3-benzothiazolyl-2-amine afforded new derivatives of benzo[4,5]thiazolo[3,2-a]pyrimidine, 3-substituted 2-hydroxy-4H-benzo[4,5]-thiazolo[3,2-a]pyrimidine-4-ones. The choice between the possible tautomers was carried out basing on the X-ray diffraction analysis of 3-formyl-2-chloro derivative synthesized by formylation of unsubstituted heterocycle by Vilsmeier reaction.