The synthesis and conformational aspects of a novel dioxopiperazine—a possible β-turn constraint
作者:John S. Davies、Malgosia Stelmach-Diddams、Regis Fromentin、Alun Howells、Ron Cotton
DOI:10.1039/a904943f
日期:——
A synthetic route to a novel α,α-diamino β-keto ethoxycarbonyl-containing dioxopiperazine, capable of mimicking a β-turn, is reported. The cis configuration of the dioxopiperazine has been rationalised by NMR spectroscopy, while computational energy calculations have been used to explain the reluctance to cyclise of N-terminal partially protected dipeptides containing α,α-amino groups.
报道了一种新型α,α-二氨基β-酮乙氧羰基-含二氧哌嗪的合成路线,该化合物能够模拟β-转角结构。通过核磁共振光谱法对二氧哌嗪的顺式构型进行了合理化解释,同时利用计算能量分析说明了含有α,α-氨基的N-端部分保护二肽不易环化的原因。