## Abstract The ^1^H and ^13^C NMR spectra of __trans__‐ and __cis__‐__tert__‐butyl 2‐methoxy‐5,6‐dihydro‐2__H__‐pyran‐6‐carboxylates (1 and 2) and 6,6′‐disubstituted 2‐methoxy‐5,6‐dihydro‐2__H__‐pyrans (3‐7) have been recorded. HH and CH coupling constants are discussed in terms of the ^1^H~6~⇄^6^
350 MHz 1H NMR spectra, dipole moments and preferred conformation of 8,9-epoxy-6,7-dihydro-5H-benzocyclohepten-5-ones
✍ Scribed by Jean Huet; Zofia Kotkowska-Machnik; Janusz Zakrzewski
- Publisher
- John Wiley and Sons
- Year
- 1981
- Tongue
- English
- Weight
- 182 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
350 MHz ^1^H NMR spectra and dipole moments showed that in the preferred conformation of 8,9‐epoxy‐6,7‐dihydro‐5__H__‐benzocyclohepten‐5‐one and its 1,4‐dimethoxy derivative the oxirane ring takes a pseudo‐axial position.
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Unambiguous 1H and 13C chemical shift assignments of the novel antibiotic 6,7,8,9-tetrahydro-7,7dimethyl-dioxolo [5,4-b]acridin-9-one were made using the FUCOUP pulse sequence. The appropriate phase cycling was calculated using the Compact Cartesian Coordinate Product Operator (C3PO) method. Copyrig
## Abstract The ^1^H and ^13^C NMR chemical shifts of 1,2,3,4,5,6,7,8‐octahydroacridine, 12 of its 9‐substituted derivatives, and of the corresponding __N__‐oxides were determined, assigned, and discussed in terms of 9‐substituent effects and effects of __N__‐oxidation. A good linear correlation wa