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New zwitterionic heterocycles derived from 1-chloro(dimethyl)silyl-1-borylalkenes and 2-lithio-1-methylimidazole and 1-lithio-indazole

✍ Scribed by Bernd Wrackmeyer; Heidi Maisel; Wolfgang Milius; Amin Badshah; Elias Molla; Abdul Mottalib2


Book ID
108346620
Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
144 KB
Volume
602
Category
Article
ISSN
0022-328X

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New synthetic approaches to bridgehead n
✍ Andrea Santagati; Maria Modica; Maria Santagati 📂 Article 📅 2000 🏛 Journal of Heterocyclic Chemistry 🌐 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 *