𝔖 Bobbio Scriptorium
✦   LIBER   ✦

13C NMR specta of 4-quinolones and related compounds

✍ Scribed by Alan R. Katritzky; Joan Ellison; Judit Frank; Piroska Rákóczy; Lajos Radics; Eszter Gács-Baitz


Publisher
John Wiley and Sons
Year
1981
Tongue
English
Weight
479 KB
Volume
16
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis


Abstract

Complete assignments are made for 23 4‐quinolones and related compounds. Literature data are used to calculate chemical shifts for 17 of these compounds: calculated and experimental shifts are in excellent agreement—all within 5 ppm for nine of the compounds and a maximum discrepancy of 7.6 ppm.


📜 SIMILAR VOLUMES


13C NMR spectra of benzofuroxan and rela
✍ F. A. L. Anet; Issa Yavari 📂 Article 📅 1976 🏛 John Wiley and Sons 🌐 English ⚖ 296 KB

## Abstract The ^13^C n.m.r. spectrum of benzofuroxan at −15°C is assigned on the basis of selective decoupling experiments and by comparison with the ^13^C chemical shifts of model compounds. The ^13^C spectra were also measured in trifluoroacetic acid as a solvent. From the temperature dependence

13C NMR studies of some hydroxycoumarins
✍ S. S. Sankar; R. D. Gilbert; R. E. Fornes 📂 Article 📅 1982 🏛 John Wiley and Sons 🌐 English ⚖ 252 KB

## Abstract The ^13^C chemical shifts and one‐bond carbon‐hydrogen coupling constants have been obtained for some hydroxycoumarins and their corresponding acetoxy and methoxy derivatives. The changes in the one‐bond carbon‐hydrogen coupling constants resulting from the conversion of a hydroxy group

1H and 13C NMR spectra of 3-substituted
✍ Ľubomír Zalibera; Viktor Milata; Dušan Ilavský 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 180 KB 👁 2 views

A series of 14 3-substituted 4-oxoquinolones with or without a substituent (methyl, ethyl) in position 1 were prepared. Literature and measured data were used to study the inÑuence of the substituent on the shifts of carbon atoms of these compounds, which are model compounds for antibacterial drugs

13C NMR investigation of some hetero-rin
✍ G. M. Coppola; A. D. Kahle; M. J. Shapiro 📂 Article 📅 1981 🏛 John Wiley and Sons 🌐 English ⚖ 379 KB

## Abstract A series of 2‐ and 4‐quinolones substituted in the hetero‐ring have been evaluated using ^13^C NMR techniques. Substituent effects are discussed as an aid to evaluation of potential tautomerization in the 2‐quinolone systems. The observed substituent shifts for systems having a hydroxy

1H and 13C NMR studies of 7-azaindole an
✍ R. H. Cox; S. Sankar 📂 Article 📅 1980 🏛 John Wiley and Sons 🌐 English ⚖ 253 KB

## Abstract The ^1^H and ^13^C chemical shifts, proton‐proton coupling constants, and one‐bond carbon‐hydrogen coupling constants have been obtained for 7‐azaindole, 1‐methyl‐7‐azaindole, their corresponding methyl iodide salts, and the related compound 7‐methyl‐7__H__‐pyrrolo [2,3‐__b__]pyridine.

Cyclothioacetals and Cycloacetals of And
✍ G. M. Caballero; E. G. Gros 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 203 KB 👁 1 views

The 13C NMR spectra 1 7 derivatives of androst-4-ene-3,17-dione were recorded and assigned. Assignments were based on spectral comparison with compounds of similar structure and distortionless enhancement by polarization transfer (DEPT) NMR measurements.