反应详情

The title product was prepared following the method described for the Compound of Example 3 but using as starting material Compound 305a instead of the Compound of Example 2 and stirring at ambient temperature for 3 days. The reaction mixture was evaporated to dryness in vacuo, taking up the residue several times with chloroform to remove excess trifluoroacetic acid.

1. customThe reaction mixture was evaporated to dryness in vacuo
2. customto remove excess trifluoroacetic acid