Keto–enol tautomerism, NMR spectra, and H–D exchange of 4-hydroxycoumarins
✍ Scribed by Traven, Valery F.; Negrebetsky, Vadim V.; Vorobjeva, Larisa I.; Carberry, Edward Andrew
- Book ID
- 121081383
- Publisher
- NRC Research Press
- Year
- 1997
- Tongue
- French
- Weight
- 117 KB
- Volume
- 75
- Category
- Article
- ISSN
- 0008-4042
- DOI
- 10.1139/v97-043
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
## Abstract An efficient method has been developed for the synthesis of a novel β-keto ester-containing pyranoquinoline compound, i.e., ethyl 4-oxo-3,4-dihydro-1H-pyrano[3,4-b]quinoline-3-carboxylate. The method entails a two-step synthesis. The first step involves the Williamson-type reaction of e
The tautomeric equilibria of the b-ketoesters [CH 3 C(O)CH 2 C(O)OCH 3 (I), CH 3 C(O)CHClC(O)OCH 3 (II), CH 3 C(O)CH 2 C(O)OCH 2 CH 3 (III) and CH 3 C(O)CHClC(O)OCH 2 CH 3 (IV)] were studied by NMR spectroscopy and, in the case of I and II, by quantum chemical calculations (ab initio and density fun