Conformational equilibria in saturated six-membered rings

Nitrogen heterocycles see also N-Heterocyclic compounds) advances in amination of, 49, 117 aromatic six-membered. regioselective substitution in, 44, 199 conformational equilibria in saturated six-membered rings, 36, I covalent hydration in, 20, 117 photochemistry of, 30, 239 reactions of acetylenecarboxylic esters with, 23, 263... 

Conformational Equilibria in Nitrogen-Containing Saturated Six-Membered Rings... 

Conformational equilibria in nitrogen-containing saturated six-membered rings, 36, 1... 

Condensed heterocyclo[n,m-n, b, or cjquinazolines. 52, I Condensed 4-thiazolidinones, 49, I Condensed thiophene systems, tetra- and pentacyclic, 32, 127 Condensed 1,2,4-triazines I. Fused to heterocycles with three-, four-, and five-membered rings, 59, 39 Condensed l,2,4-triazolo[3,4-z) heterocycles, synthesis, 49, 277 Conformational equilibria in nitrogen-containing saturated six-membered rings, 36, I... 

Crabb, T. A., Katritzky, A. R., Conformational Equilibria in Nitrogen-Containing Saturated Six-Membered Rings,... 

PE spectroscopy has also been applied to the study of the conformational equilibria of saturated heterocyclic six-membered rings, and in particular of hexahydropyridazines. The... 

The general principle that the protons in the alicyclic six-membered rings of saturated six-five-, six-six-, and six-seven-membered fused ring systems give the smallest tJ values (ca. 8-11 Hz) for 4a- and 8a-H in the Z-in form, intermediate values (ca. 20 Hz) in the Z-out form for the ds-fused isomers, and clearly higher values (ca. 25-30 Hz) for the trans-fused isomers [71JCS(C)3222] is applied next to estimate the conformational equilibria in 4-oxo-(thioxo) and 2,4-dioxo(thioxo) derivatives. 

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