Differentiation between 6- and 7-Membered Rings Based on Theoretical Calculation of NMR Parameters
Figure 1
Depiction of various NMR parameters considered in a previous study [1] for rendering distinction between 5- and 6-membered ring products, namely, 1,3-thiazolidin-4-one and 1,3-thiazin-4-one products, respectively, obtained [10, 11] from 2-substituted 1-(9-acridinyl) thiosemicarbazides by reagent selection (dimethyl acetylenedicarboxylate in the former case and methyl propiolate in the latter case).
