New synthetic approaches to bridgehead n
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Andrea Santagati; Maria Modica; Maria Santagati
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Article
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2000
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Journal of Heterocyclic Chemistry
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English
⚖ 260 KB
## Abstract Bridgehead nitrogen heterocycles **3a**, **b** and **6a**, **b** containing the thieno‐pyrimidine system have been prepared from the versatile intermediates 3‐amino‐2,3‐dihydro‐5,6‐dimethyl‐2‐thioxo‐thieno[2,3‐__d__]pyrimidin‐4‐(1__H__)‐one **1** and its hydrazinium or potassium salts *