## Abstract Solvent effects on the ^1^H NMR parameters of perhydro‐oxazolo[3,4‒__a__]pyridine, perhydropyrido[1,2‒__c__]‒[1,3]oxazine and perhydrothiazolo[3,4‒__a__]pyridine derivatives are described. Particularly marked are changes in the proton‐proton geminal coupling constants of the NCH~2~O and
✦ LIBER ✦
The proton magnetic resonance spectra of porphyrins—VII: Synthesis and NMR studies of thallium(III) coproporphyrin chelates
✍ Scribed by R.J. Abraham; Graham H. Barnett; E.S. Bretschneider; K.M. Smith
- Publisher
- Elsevier Science
- Year
- 1973
- Tongue
- French
- Weight
- 735 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0040-4020
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## Abstract A series of substituted hexahydropyrido [2,1‐__c__] [1,4] oxazin‐3(4__H__)‐ones has been synthesised, and the configurations of these bicyclic lactones assigned utilising chemical and spectral data. All the compounds adopt __trans__‐fused conformations and the conformation of the lacton