反应详情

A solution of product of Example 62 in pyridine is treated with an excess of hydroxylamine hydrochloride and the reaction is stirred at room temperature for 2 d. The solution is concentrated in vacuo and the residue is chromatographed on silica gel to give the title compound.

1. concentrationThe solution is concentrated in vacuo
2. customthe residue is chromatographed on silica gel