Solution conformation and dynamics ofL-6-methylperhydroimidazo[1,5-c]thiazole-5,7-dione (γ-thiaprolinehydantoin). A1H and13C NMR study
摘要:
AbstractThe solution conformation of L‐6‐methylperhydroimidazo[1,5‐c]thiazole‐5,7‐dione (γ‐thiaprolinehydantoin) has been determined from an extensive 1H and 13C NMR study, allowing the extraction of vicinal inter‐proton and carbon‐hydrogen coupling constants. The major conformation of the thiazolidine ring is an envelope with C‐δ as the flap exo (δ−). In solution the preferred solid state (twist) conformer with C‐α exo and C‐β endo (αβT) is only a minor contributor. 13C spin–lattice relaxation data reveal the flexibility of the thiazolidine ring.