Synthesis and a study of the 13C NMR spectroscopic properties of positional isomers of some C18 acetylenic thia fatty esters

2002 ARKIVOC  
The carbon magnetic resonance spectra of four positional acetylenic thia fatty acid methyl ester isomers have been recorded to investigate the effect of the sulfur atom on the chemical shifts of the carbon nuclei adjacent to it. Methyl 6-thia-10-octadecynoate (6). Rf 0.4 (PE10); 1 H-NMR δ 3.66 (3H, s, OMe), 2.61 (2H, t, J = 6.8, 7-H), 2.52 (2H, t, J = 6.8, 5-H), 2.34 (2H, t, J = 7.0, 2-H), 2.0-2.2 (4H, m, 9-H and 12-H), 1.6-1.9 (6H, m, CH 2 ), 1.2-1.5 (10H, m, CH 2 ), 0.88 (3H, t, Me); 13 C-NMR
more » ... H, t, Me); 13 C-NMR δ 173.71 (1-C),
doi:10.3998/ark.5550190.0003.321 fatcat:g6ubjoxfrjbpvbghhvvhsg43cq