𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Cycloaddition reactions of heteroazadienes: [4+2] cycloaddition of 1-thia-3-azabutadienes with electron-poor dienophiles

✍ Scribed by José Barluenga; Miguel Tomás; Alfredo Ballesteros; Luis A. López


Publisher
Elsevier Science
Year
1989
Tongue
French
Weight
209 KB
Volume
30
Category
Article
ISSN
0040-4039

No coin nor oath required. For personal study only.

✦ Synopsis


Summmy. 1-Thia-3-azabutadienes cleanly undergo [4 + 21 cycloaddition processes with electron-poor dienophiles; the reaction is regioselective and leads exclusively to the endo isomer.


📜 SIMILAR VOLUMES


Synthesis of 2,5-bis-arylpyridines by [4
✍ Jean-Laurent Paparin; Christophe Crévisy; René Grée; Loïc Toupet 📂 Article 📅 2000 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 563 KB

## Abstract Tetrahydropyridines **4a, 4b, 4c** and pyridines **7a, 7b, 7c, 9a, 9b, 9c** were synthesized by a [4 + 2] cycloaddition between 1,4‐bis aryl‐2‐aza‐1,3‐butadienes and electron‐poor dienophiles. Dimeric cycloadducts **6a, 6b, 6c**, were also isolated indicating a competition between the e