1. The Evaluation of Present Antileprosy Compounds
2. A nuclear magnetic resonance study of solvent effects on the conformational preference of thioxanthene S-oxides
3. In a study of the oxygen-17 nmr spectra of a series of substituted thioxanthene sulfoxides, we have found that the sulfoxides described in this manuscript have approximately the same chemical shift (acetonitrile solvent; 75°) and that the minor differences which are observed can be related to substituent electronic effects rather than to alterations in a' vs e' preferences. Furthermore, a' oxygen resonates downfield of e' oxygen in these sulfoxides (W. W. Lam, B. Mlotkowska and A. L. Ternay, Jr., manuscript in preparation).
4. Benzene eluent, Eastman silica gel plates, iodine and/or uv visualization.
5. The presence of a singlet demands that these rings undergo rapid ring inversion; a “frozen” ring would have given rise to a pair of AB doublets.