NMR studies of pyridazine-N-oxide. Determination of spectroscopic parameters from the [15N]- and parent species
✍ Scribed by Torben Wamsler; Jørgen Tormod Nielsen; Erik Jonas Pedersen; Kjeld Schaumburg
- Publisher
- Elsevier Science
- Year
- 1981
- Weight
- 695 KB
- Volume
- 43
- Category
- Article
- ISSN
- 0022-2364
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## Abstract __N__^ω^‐Hydroxy‐L‐arginine (2) was prepared by a multi‐stage synthesis; the key step was the addition of hydroxylamine to the protected cyanamide 8. The presence of __N__‐hydroxyguanidines was confirmed, above all, by ^15^N‐NMR investigations. ^15^__N__^ω^‐Hydroxy‐L‐arginine (2) was co
## Abstract The ^1^H, ^13^C and ^15^N NMR spectra in DMSO‐__d__~6~ were measured for eight nitraminopyridine __N__‐oxides, ten 4‐nitropyridine N‐oxides, four 2‐nitraminopyridines and five 4‐nitropyridines. Their chemical shift assignments are based on PFG ^1^H,X (X = ^13^C and ^15^N) HMQC and HMBC