Showing papers by "Gary E. Martin published in 1980"
TL;DR: In this paper, the synthesis of the 2-azaphenoxathiin ring system via the intermediary 2-asphenoxathyin 2-oxide is described, based on the observed heteronuclear 1H-13C spin-couplings of the system and calculated chemical shifts as assignment criteria.
21 citations
TL;DR: In this paper, the synthesis of the first diazaphenoxathiins, 1,9-diazaphoenoxathiin and 1,7-Diazaphhenoxathyin, were described.
20 citations
16 citations
TL;DR: In this paper, a linear relationship between the 13C-nmr chemical shifts of the C-la carbon and the dihedral angle in a series of phenoxathiin analogs is reported.
15 citations
TL;DR: In this paper, the synthesis of 1-azaphenoxathiin Noxide is described and the total assignment of the 13C-nmr spectrum and the effects of the Noxide moiety on the chemical shifts and 1H-13C spin couplings constants are compared and compared to the parent 1-enzaphhenoxathyin system.
12 citations
TL;DR: In this paper, X-ray data indicate that thioxanthones react with carbenes generated from dialkyl diazomalonates to form sulphonium ylides which contain a comparatively flat heterocyclic ring.
Abstract: 1 H and 13C N.m.r., i.r., and X-ray data indicate that thioxanthones react with carbenes generated from dialkyl diazomalonates to form sulphonium ylides which contain a comparatively flat heterocyclic ring.
3 citations
TL;DR: In this paper, the total assignment of the 13C-nmr spectrum of 1-azaphenoxathiin 10,10-dioxide is reported based on the utilization of additivity correlations for the conversion of sulfide to sulfone linkages.
3 citations