- Novel 6-azapteridines from bifunctional 1,2,4-triazines
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The convergent synthesis of ethyl 5-chloro- and 5-amino-3-aryl-1,2,4-triazinecarboxylates 9a-9d and 10a-10d as well as of 5-amino-3-aryl-1,2,4-triazine-6-carboxamides 11a-11d is described. Compounds 9, 10 and 11 are powerful key compounds for cyclization reactions to the novel pyrimido[4,5-e][1,2,4]triazines 13d, 14c, 14d, 15c and 17a, 17d.
- Wamhoff, Heinrich,Tzanova, Milena
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p. 965 - 974
(2007/10/03)
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- The Chemistry of 1,2,4-Triazines, XIV. - Synthesis and Reactions of 5-Chloro-1,2,4-triazines
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5-Chloro-1,2,4-triazines 4 are prepared from 1,2,4-triazin-5(2H)-ones 3 and transfered into 5-amino- (7), 5-cyano (8), and 5-(ω-alkinyloxy)-1,2,4-triazines (9). 7a-d are cyclized to imidazo1,2,4-triazines (10a-d).
- Neunhoeffer, Hans,Reichel, Diethard,Cullmann, Birgit,Rehn, Ingrid
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p. 631 - 640
(2007/10/02)
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