反应详情

A solution of the product of Step 1 (0.15 g, 0.56 mmol) in N,N-dimethylformamide dimethyl acetal (5 ml) was heated at 100° C. for 18 hours. After cooling to room temperature, the solvent was removed in vacuo to afford the title compound (0.18 g, 98%); MS (ES+) m/e 325 [M+H]+.

1. customthe solvent was removed in vacuo