作者:Leon W. A. Van Berkom、Ren� de Gelder、Hans W. Scheeren
DOI:10.1002/ejoc.200400782
日期:2005.3
series of 6-spiro-1,4-diazepane-2,5-diones containing an arylpropylamide moiety via head-to-tail cyclisation of a terminal amine and a terminal carboxylate ester is described. To induce ring closure of the dipeptide precursor, both lactamisation of the N4/C5 amide bond and N1/C2 amide bond were investigated. Whereas ring closure of the N4/C5 amide bond proved unsuccessful, ring closure of the N1/C2 amide
描述了一系列含有芳基丙基酰胺部分的 6-spiro-1,4-diazepane-2,5-diones 通过末端胺和末端羧酸酯的头对尾环化的合成。为了诱导二肽前体的闭环,研究了 N4/C5 酰胺键和 N1/C2 酰胺键的内酰胺化。N4/C5 酰胺键的闭环被证明是不成功的,而 N1/C2 酰胺键的闭环更可行。此外,发现在肽序列中掺入 N,N-二取代酰胺键对于环化的发生是必不可少的。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)