反应详情

The protected amide from (a)(1.4 g) was deprotected with aqueous trifluoroacetic acid (10 ml) as in Example 7(b). Chromatography on silica in chloroform:methanol:acetic acid: water 120:36:2:3 gave a gum (1.1 g). Rf3A=0.61, Rf7B=0.71