α-Disubstituted pyrrolidine-2-methanols were synthesized starting from L-proline and their application as chiral auxiliary in the asymmetric NaBH 4 reduction of α,β-unsaturated triazolyl ketones was investigated. The corresponding α,β-unsaturated triazolyl alcohol derivatives (Uniconazole and Diniconazole) were obtained in good chemical yields with high ee values (up to 93%).
以
L-脯氨酸为原料合成了α-二取代
吡咯烷-2-甲醇,并研究了其作为手性助剂在α,β-不饱和三唑基酮的不对称NaBH 4 还原中的应用。以良好的
化学收率获得了相应的 α,β-不饱和
三唑醇衍
生物(Uniconazole 和 Diniconazole),具有高 ee 值(高达 93%)。