銠金屬催化不對稱合環反應-探討溶劑與官能基之影響 Rhodium(I)-Catalyzed Asymmetric Cyclization Reactions Investigation of Solvent and Functional Group Effects
This study employed a rhodium-based catalyst to conduct an asymmetric
cyclization reaction, using aryl boronate compounds and alkynes as starting materials.
The effects of different solvents and substituents on reaction yield and enantiomeric
excess (ee) were investigated.
Two required starting materials were synthesized in this study. First, the
influence of various solvents on the asymmetric catalytic reaction was examined.
Next, several aryl boronate starting materials with different substituents were
synthesized to further explore how solvent and substituent variations affect yield and
enantiomeric excess.
The results showed that under reaction conditions using dioxane as the solvent,
the optimal yield reached up to 95%, with an enantiomeric excess of 96.5%. In the
substituent experiments, both the electron-donating and -withdrawing effects, as well
as steric hindrance, were found to influence the yield and enantiomeric excess. Future
studies will continue to explore rhodium-catalyzed asymmetric cyclization reactions
by introducing more substituent variations. It is also anticipated that rhodiumcatalyzed reactions can be further applied in materials science and pharmaceutical
fields.