Single-step conversion of aliphatic, aromatic and heteroaromatic primary amines into piperazine-2,6-diones
作者:C. G. Kruse、J. J. Troost、P. Cohen-Fernandes、H. van der Linden、J. D. van Loon
DOI:10.1002/recl.19881070402
日期:——
single-step method for the synthesis of 1,4-disubstituted piperazine-2,6-diones (4) in excellent yields from the corresponding aliphatic, aromatic and heteroaromatic primary amines and iminodiacetic acids (1) is described. A possible mechanism is discussed and the presence of intermediate 6a is confirmed by high-resolution proton NMR spectroscopy. The subsequent two-step conversion of dione 4a into the deoxygenated
一个轻便,单步方法的1,4-二取代的哌嗪-2,6-二酮(合成的发展4以优良产率)从相应的脂族,芳族和杂芳族伯胺和亚氨基二乙酸(1)中描述。讨论了可能的机制,并通过高分辨率质子NMR光谱确认了中间体6a的存在。随后将二酮4a分两步高产率地转化为脱氧的4-未取代的哌嗪10,是目前可用的(杂)芳基哌嗪合成方法的一个有吸引力的替代方法。