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Pyridopyridazines. II. Some reactions of Pyrido[2,3-d]- and Pyrido[3,4-d]-pyridazine

✍ Scribed by Paul, DB; Rodda, HJ


Book ID
118138120
Publisher
Commonwealth Scientific and Industrial Research Organisation Publishing
Year
1969
Tongue
English
Weight
673 KB
Volume
22
Category
Article
ISSN
0004-9425

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📜 SIMILAR VOLUMES


Ring closure reactions of pyrido[2,3-d]p
✍ Dang Van Tinh; Wolfgang Stadlbauer 📂 Article 📅 2008 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 419 KB

## Abstract magnified image The cyclocondensation of 5‐hydroxy‐pyrido[2,3‐__d__]pyrimidines **1** with malonates gives pyrano[2′,3′:4,5]‐pyrido[2,3‐__d__]pyrimidines **2**. Nitration of **1** and reduction with zinc in the presence of carboxylic acids/anhydrides gave 2‐alkyloxazolo[5′,4′:4,5]pyrid

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✍ Mátyus, Péter ;Sohár, Pál ;Wamhoff, Heinrich 📂 Article 📅 1984 🏛 John Wiley and Sons 🌐 English ⚖ 453 KB

## Abstract The novel 7‐hydrazino‐1,3‐dimethylpyrido[2,3‐__d__]pyrimidine‐2,4(1__H__,3__H__)‐dione (**2**) gives the hydrazine derivatives **3, 5, 6, 8**, and **10**. The __s__‐triazolo[4′,3′: 1,6]pyrido[2,3‐__d__]pyrimidine **4** is prepared from **3**, while the attempted cyclizations of **5, 6**