反应详情

The reaction was carried out similarly as described in the preparation of compound 405, using compound 429 (8.46 mmol). The crude product was purified by flash chromatography using EtOAc/petroleum ether (40-60) 2:8 followed by 3:7 as the eluent to afford the title compound as solid.

1. customThe crude product was purified by flash chromatography