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A Convenient Synthesis for Some New Pyrido[4′,3′:4,5]thieno[2,3-d]pyrimidines and Related Fused 1,2,4-Triazolo and 1,3,4-Thiadiazolo-derivatives

✍ Scribed by Ahmed, Essam Kh.


Book ID
121199280
Publisher
Taylor and Francis Group
Year
2002
Tongue
English
Weight
167 KB
Volume
177
Category
Article
ISSN
1042-6507

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Synthesis of 3-substituted pyrido[4′,3′:
✍ Essam Kh. Ahmed 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 104 KB 👁 1 views

## Abstract Convenient syntheses of 3‐substituted ethyl 4‐oxo‐2‐thioxo‐1,2,3,4,5,6,7,8‐octahydropyrid[4′,3′:4,5]thieno[2,3‐d]pyrimidine‐7‐carboxylates **__3a, b, 6, 11–13__**, ethyl 3‐methyl‐5‐oxo‐2,3,6,9‐tetrahydro‐5 H‐pyrido[4′,3′:4,5]thieno[2,3‐d][1,3]thiazolo[3,2‐a]pyrimidine‐8‐7H‐carboxylate (