An intramolecular cyclization of S-(ω-carboxyalkyl)thiolanium salts took place readily under weakly basic conditions to afford sulfur-containing macrocyclic lactones in good yields.
S-(ω-羧基烷基)硫醇盐的分子内环化在弱碱性条件下很容易发生,以良好的产率得到含硫大环内酯。
Intramolecular cyclization of (.omega.-carboxyalkyl)sulfonium salts. A novel synthesis of macrocyclic lactones