“…The solvent was removed in vacuo and the product was purified by flash column chromatography (hexane-EtOAc) to give the corresponding tertiary amide. Compounds 3 aa, [14] 3 ba, [15] 3 ca, [16] 3 ha, [17] 3 ja, [18] 3 ka, [19] 3 la, [20] 3 na, [21] 3 ab, [22] 3 ac, [23] 3 ad, [24] 3 ae, [24] 3 af [25] , 3 nf [26] , 3 fa [27] , 3 ga [28] were characterized by comparison of their physical and spectroscopic data with those described in the literature. Full data for the new compounds 3 da, 3 ea and 3 ma are provided below.…”