Novel intermediates and processes for the preparation of optically active octanoic acid derivatives
申请人:ONO PHARMACEUTICAL CO., LTD.
公开号:US20020028947A1
公开(公告)日:2002-03-07
Novel intermediates, i.e., N-(2S-(2-propenyl)octanoyl)-(1S)-(−)-2,10-camphorsultam, N-(2S-(2-propynyl)octanoyl)-(1S)-(−)-2,10-camphorsultam and N-(2R-(2-propyl)octanoyl)-(1S)-(−)-2,10-camphorsultam; processes for the preparation of the intermediates; and processes for the preparation of optically active 2S-(2-propenyl)octanoic acid, 2S-(2-propynyl)octanoic acid and 2R-propyloctanoic acid by using the same. Optically active 2R-propyloctanoic acid equivalent or superior to that prepared by the process of the prior art in optical purity can be efficiently prepared in shorter reaction steps.
新型中间体,即N-(2S-(2-丙烯基)辛酰基)-(1S)-(-)-2,10-樟脑磺酰胺、N-(2S-(2-丙炔基)辛酰基)-(1S)-(-)-2,10-樟脑磺酰胺和 N-(2R-(2-丙基)辛酰基)-(1S)-(-)-2,10-樟脑磺酰胺;制备上述中间体的工艺;以及利用上述中间体制备光学活性 2S-(2-丙烯基)辛酸、2S-(2-丙炔基)辛酸和 2R- 丙辛酸的工艺。光学活性 2R- 丙辛酸在光学纯度上等同或优于现有技术工艺制备的 2R- 丙辛酸,可在较短的反应步骤中高效制备。