Proton magnetic resonance studies of compounds with bridgehead nitrogen atoms. XIV .: The influence of an axial 5-methyl group on the chemical shifts of C2 methylene protons in 1,3-heterosystems

Proton magnetic resonance studies of com

Proton magnetic resonance studies of compounds with bridgehead nitrogen atoms—XX: The NMR spectra and stereochemistry of some hexahydropyrido[2, 1-c] [1, 4] oxazin-3(4H)-ones and related compounds

✍ R. Cahill; T. A. Crabb 📂 Article 📅 1972 🏛 John Wiley and Sons 🌐 English ⚖ 779 KB

## 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