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Thieno oxazin-4-ones, transformation

Thieno[2,3-d]pyrimidines can also be synthesized by cyclic transformations from other ring systems. Thieno[2,3-d]oxazin-4-ones 123 were transformed into 3-substituted thieno[2,3-d]pyrimidin-4-ones 19a-d by treat-... [Pg.218]

Briel et al. (90GEP282011) describe the transformation of thieno[3,2-d]-l,3-oxazin-4-ones 361 into thieno[3,4-d]pyrimidines 362 by heating with ammonia saturated DMF or with primary amines. This transformation is an example of an ANRORC reaction. [Pg.267]




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Thieno oxazines

Thieno[2,3- -ones

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