The present invention relates to a process for producing an optically active 1,4-pentanediol by asymmetrically reducing 5-hydroxy-2-pentanone, which is easily available at low cost. The present invention also relates to a process for producing an optically active 1-substituted 2-methylpyrrolidine including sulfonylating the optically active 1,4-pentanediol to convert it to an optically active sulfonate compound, and reacting the compound with an amine. According to the processes of the present invention, an optically active 1,4-pentanediol and an optically active 1-substituted 2-methylpyrrolidine, which are useful as an intermediate for medicines and an intermediate for agricultural chemicals, can be simply produced from an inexpensive starting material.
本发明涉及一种通过不对称还原
5-羟基-2-戊酮生产光学活性
1,4-戊二醇的工艺,该工艺成本低,易于获得。本发明还涉及一种生产光学活性 1-取代
2-甲基吡咯烷的工艺,包括对光学活性
1,4-戊二醇进行磺化以将其转化为光学活性
磺酸盐化合物,并使该化合物与胺反应。根据本发明的工艺,光学活性的
1,4-戊二醇和光学活性的 1-取代
2-甲基吡咯烷可以简单地从廉价的起始原料中生产出来,这两种物质可用作医药中间体和农药中间体。