New synthetic approaches to 4(1H)-pyridinone derivatives. 3. 2-Bromoacetylated enamines as pyridine ring synthons
β Scribed by Abdulla, Riaz F.; Fuhr, Kenneth H.; Williams, James C.
- Book ID
- 127387792
- Publisher
- American Chemical Society
- Year
- 1979
- Tongue
- English
- Weight
- 397 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0022-3263
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π SIMILAR VOLUMES
4,4'-biphenyl, 1-naphthyl, 2-thienyl, 2-furyl, is reported. The corresponding series of 2-aryl(heteroaryl)-4-trifluoromethyl-3H-pyrido[2,3-b][1,4]diazepin-4-ols obtained from intramolecular cyclization reaction of the respective trifluoroacetyl enamines or from the direct cyclocondensation reaction
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## Abstract Bridgehead nitrogen heterocycles **3a**, **b** and **6a**, **b** containing the thienoβpyrimidine system have been prepared from the versatile intermediates 3βaminoβ2,3βdihydroβ5,6βdimethylβ2βthioxoβthieno[2,3β__d__]pyrimidinβ4β(1__H__)βone **1** and its hydrazinium or potassium salts *