A facile regioselective synthesis of (5-amino-4-cyano-1h-imidazol-1-yl) benzoic acids
✍ Scribed by Síria A. Barros; M. Sameiro T. Gonçalves; Ana M. F. Oliveira-Campos; Fernanda R. P. Proença
- Publisher
- Journal of Heterocyclic Chemistry
- Year
- 2007
- Tongue
- English
- Weight
- 458 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0022-152X
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✦ Synopsis
Abstract
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A simple and efficient method was developped for the synthesis of 3‐(5‐amino‐4‐cyano‐1__H__‐imidazol‐1‐yl)‐4‐substituted benzoic acids 3. These compounds were isolated by intramolecular cyclisation of the corresponding 3‐{[(Z)‐2‐amino‐1,2‐dicyano‐vinyl]amino}methyleneaminobenzoic acids in the presence of base.
📜 SIMILAR VOLUMES
## Treatment of the hydrochloride salts of 4-chloro-5-(2halomethylaryl-imino)-5H-l,2,3-dithiazoles (2) with sodium cyanoborohydride in THF at room temperature gave 2-cyan0-4H-3,l -benzothiazines ( I ) in good to moderate yields. 2-Cyano-4H-3,l -benzoxazines (4) were obtained in good to moderate yiel
## Abstract The previously unknown title compounds (IV) are synthesized through thermal intramolecular cyclocondensation of hydrazones (III).
## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v
## Abstract magnified image Oxidation of metronidazole (**4**) with sodium dichromate yielded the corresponding 2‐(2‐methyl‐5‐nitro‐1__H__‐imidazol‐1‐yl)acetic acid (**5**) which was esterified with 1‐butanol to give butyl 2‐(2‐methyl‐5‐nitro‐1__H__‐imidazol‐1‐yl)acetate (**8**). Reaction of the l