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Azinoiminophosphorane mediated synthesis of 5H, 7H-1,2,4-triazolo[1,5-c][1,3]benzoxazepin-7-ones and 6H,8H-1,2,4-triazolo-[1,5-c][1,3]oxazepin-6-ones

✍ Scribed by Chang Hoon Lee; Bong Gyu Kim; Kee-Jung Lee

Publisher
Journal of Heterocyclic Chemistry
Year
2002
Tongue
English
Weight
31 KB
Volume
39
Category
Article
ISSN
0022-152X

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✦ Synopsis

Abstract

The aza‐Wittig reactions of benzophenone‐, acetophenone‐ and benzaldehyde l‐[(triphenylphosphoranyl‐idene)amino]ethylidenehydrazones (4) with phthalic anhydride, 2,3‐dimethylmaleic anhydride and 7‐oxabi‐cyclo[2,2,l]hept‐5‐ene‐2,3‐dicarboxylic anhydride (5a) provide a new route to 5__H__,7__H__‐1,2,4‐triazolo[1,5‐c]‐[1,3]benzoxazepin‐7‐ones 8a‐c or 6__H__,8__H__‐1,2,4‐triazolo[1,5‐c][1,3]oxazepin‐6‐ones 8d‐h via the thermal reaction of the expected azinoimine lactones 6.

📜 SIMILAR VOLUMES

Azinoiminophosphorane mediated 4H,8H-1,2
Azinoiminophosphorane mediated 4H,8H-1,2,4-triazolo[1,5-C]-[1,3]oxazepin-4-ones and 5,6-dihydro-7H, 12H-naphtho[2,1-f]-[1,2,4]triazolo[1,5-c][1,3]oxazepin-7-ones synthesis
✍ Kyoung Tae Kim; Chang Hoon Lee; Kee-Jung Lee 📂 Article 📅 2003 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 41 KB

## Abstract The aza‐Wittig reactions of benzaldehyde‐, acetophenone‐ and benzophenone 1‐[(triphenylphosphor‐anylidene)amino]ethylidenehydrazones (**1**) with 2,3‐furandiones **6** provide a new route to 4__H__,8__H__‐1,2,4‐triazolo[1,5‐__c__][1,3]oxazepin‐4‐ones **14** or 5,6‐dihydro‐7__H__,12__H__