作者:Andrea Defant、Ines Mancini
DOI:10.1016/j.tet.2013.04.012
日期:2013.6
With the aim to produce the new corresponding amide, amino pyrone 1 [=4-(benzylamino)-6-methyl-2H-pyran-2-one] was acylated in dichloromethane in the presence of triethylamine, obtaining an unexpected mixture of N- and C-acyl products in a 60:40 ratio, respectively. The regioselective investigation was enlarged by using a series of organic bases and taking into account both solvent effects and acyl
为了生产新的相应酰胺,在三乙胺存在下,在二氯甲烷中将氨基吡喃酮1 [= 4-(苄基氨基)-6-甲基-2 H-吡喃-2-酮]酰化,得到N的意外混合物-和C-酰基产物的比例分别为60:40。通过使用一系列有机碱并考虑到溶剂效应和酰卤结构,扩大了区域选择性研究。建立了能够产生纯酰胺或纯C-酰基产物的条件。该研究还包括β-烯氨基酯与涉及分子内氢键的NH基团的反应性,从而获得纯的C-酰基产物。