反应详情

230 mg of 5-(4-methanesulfonyl-phenoxy)-2-pyridin-2-yl-6-pyrrolidin-2-yl-1H-benzimidazole obtained in Example 162 (step 7) was optically resolved, using an optical resolution column (CHIRALPAK AD 2 cmφ×25 cmL (by Daicel Chemical), mobile phase: hexane/2-propanol/diethylamine=20/80/0.1, flow rate: 10 ml/min), into an enantiomer A (retention time: 19.0 min) and an enantiomer B (retention time: 32.2 min) each as a yellow oily substance.