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Retro-ene reactions in heterocyclic synthesis. II. A facile synthetic method for 4-hydroxy-2-pyridones

✍ Scribed by Kunio Ito; Shingo Miyajima


Book ID
112130396
Publisher
Journal of Heterocyclic Chemistry
Year
1992
Tongue
English
Weight
467 KB
Volume
29
Category
Article
ISSN
0022-152X

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πŸ“œ SIMILAR VOLUMES


Retro-ene reactions in heterocyclic synt
✍ The Late Kunio Ito; Chiharu Sekiguchi; Asuka Wakai Hiroyuki Miida; Shogo Ihara πŸ“‚ Article πŸ“… 2007 πŸ› Journal of Heterocyclic Chemistry 🌐 English βš– 223 KB

## Abstract magnified image __N__‐__t__‐Butylamidines **1** on heating with diphenyl carbonate (**2**) at 150‐180Β° gave the 1,3,5‐triazine‐2,4(1__H__,3__H__)‐dione derivatives **5**. Acylation of amidines **1** and cyclocondensation of the resulting carbamates **3** gave [1,3,5,7]tetrazocine‐2,6‐d

Retro-ene reactions in heterocyclic synt
✍ Kunio Ito; Shingo Miyajima πŸ“‚ Article πŸ“… 1999 πŸ› Journal of Heterocyclic Chemistry 🌐 English βš– 210 KB

\(N\) - \(t\)-Butylbenzamidines 1 reacted with diphenyl phenylmalonate or diphenyl methylmalonate to give 6-hydroxypyrimidin-4(3H)-ones 4 or 5 . Amidines 1 on reaction with diphenyl imidodicarboxylate afforded \(1,3,5\)-triazine- \(2,4(1 H, 3 H)\)-diones 8 .

ChemInform Abstract: Retro-Ene Reactions
✍ Kunio Ito; Shingo Miyajima πŸ“‚ Article πŸ“… 2010 πŸ› John Wiley and Sons βš– 30 KB πŸ‘ 2 views

Retro-Ene Reactions in Heterocyclic Synthesis. Part 4. A New Synthetic Method for 6-Hydroxypyrimidin-4(3H)-ones and 1,3,5-Triazine-2,4(1H,3H)-diones. -Reaction of benzamidines (I) with substituted malonates (II) and imidodicarboxylate (IV) provides an efficient access to 6-hydroxypyrimidinones (III