Conformational behaviour of medium-sized rings. Part 10. Dithiosalicylides and trithiosalicylides
作者:G. Bruce Guise、W. David Ollis、Judith A. Peacock、Julia Stephanidou Stephanatou、J. Fraser Stoddart
DOI:10.1039/p19820001637
日期:——
a cis-thioester linkage. The dithiosalicylide derivatives (3)–(7) have been synthesised; the temperature dependence of the 1H n.m.r. spectrum of di-o-thiothymotide (7) has been interpreted in terms of ring inversion (40a)⇌(40b) between enantiomeric boat conformations. Comparison of the ΔG‡ value of 24.6 kcal mol–1 for this conformational change with that of 17.7 kcal mol–1 previously obtained for di-o-thymotide