反应详情

To the title compound of Example 20, Step A (0.03 mmol, 14 mg) in CH2Cl2 (0.6 mL) was added cyclopentanol (0.08 mmol, 7 μL), DIAD (0.06 mmol, 12 μL) and Ph3P (0.06 mmol, 16 mg). The reaction mixture was allowed to stand at ambient temperature for 16 h, then purified by chromatography on silica eluting with 10% and 25% EtOAc in hexanes to afford the product as a white solid. LC-MS (ESI, Method B): 2.12 min, m/z 524.2 (M+1).

1. custompurified by chromatography on silica eluting with 10% and 25% EtOAc in hexanes