反应详情

The reaction was carried out similarly as described in the preparation of compound 404, using compound 428 (19.2 mmol). The crude product was purified by flash chromatography using EtOAc/petroleum ether (40-60) 1:2 followed by 2:3 as the eluent to afford the title compound as solid.

1. customThe crude product was purified by flash chromatography