Nitrogen and sulfur heterocycles. 45. Dual reactivity of 1,2-dioxo-3a-alkyl-7-chloroimidazolidino[3,2-f]-pyrido[2,3-b]-1,4-thiazines
โ Scribed by L. G. Levkovskaya; L. A. Serochkina; O. S. Anisimova; N. P. Solov'eva; Yu. N. Sheinker; T. S. Safonova
- Publisher
- Springer US
- Year
- 1987
- Tongue
- English
- Weight
- 397 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0009-3122
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## Abstract The first synthesis of substituted 2,2โdioxoโ1โphenylโ1__H__โthieno[3,4โ__c__][1,2]thiazines 2 and some of their reactions are achieved. Compounds 2 were prepared from the 3,5โdimethylโ1,1โdioxoโ1,2โthiazineโ4โcarbaldehydes 1 by reaction with sulfur and triethyl amine in dimethylformami
## Abstract With a continuing interest in heteropolycyclic systems which may show biological activities, we studied the reaction of 3โaminoโ2โ(methylamino)pyridine with diethyl 1,3โacetonedicarboxylate in order to develop pyridodiazepinone derivatives. From the reaction mixture, we separated dipyri