N-Alkenyl and N-alkoxymethyl lactams are impervious to many reagents and are useful protecting groups for lactams. Conversion to the corresponding 2-ethoxy iminium salt and hydrolysis in neutral water removes the protecting group. Mild basification regenerates the lactam.
N-烯基和 N-烷氧基甲基内酰胺不受许多试剂的影响,是内酰胺的有用保护基团。转化为相应的 2-乙氧基
亚胺盐并在中性
水中
水解除去保护基团。轻度碱化可再生内酰胺。