17O NMR spectroscopy of 1-(2-hydroxyphenyl)-3- naphthylpropane-1,3-diones. Influences of keto–enol tautomerism and substituents

17O NMR Spectroscopy of Sulfolenes (2, 5

17O NMR Spectroscopy of Sulfolenes (2, 5-Dihydrothiophene-1,1-dioxides) and Sultines (3, 6-Dihydro-1,2-oxathiin-2-oxides)-Experiment and Quantum Calculations: Synthesis of 4, 9-Dioxo-1,2-oxathiacyclodecane-2-oxide, a New Heterocycle

✍ Elena Roversi; Frédéric Monnat; Kurt Schenk; Pierre Vogel; Pedro Braña; José A. 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 220 KB

The products of hetero-Diels ± Alder reactions (sultines) and cheletropic addition reactions (sulfolenes) between 1,3-dienes and sulfur dioxide can be distinguished by their 17 O NMR shifts. Experimental data have been collected for derivatives of 3,6dihydro-1,2-oxathiin-2-oxide and of 2,5dihydrothi