After 50 years of persistence the 12‐membered cyclic skeleton of bottromycin A2 (3) has been confirmed by NMR experiments (HMBC), and the configurations of two tLeu residues have been estimated by conformation analysis and NMR experiments. Furthermore, the key step in the synthesis of 3 involves the mercury‐mediated formation of the amidine of thioamide 1 and amine 2.
经过50年的坚持,通过NMR实验(HMBC)确认了肉毒霉素A 2(3)的12元环状骨架,并通过构象分析和NMR实验估计了两个t Leu残基的构型。此外,合成3的关键步骤涉及
汞介导的
硫酰胺1和胺2的formation的形成。