A conceptually simple and direct synthetic route to racemic saframycin B, a bis-isoquinoline quinone antitumor antibiotic, was studied relying on transformations of a key C-2 symmetric intermediate.
Discovery of a Class of Diketopiperazines as Antiprion Compounds
作者:Maria Laura Bolognesi、Hoang Ngoc Ai Tran、Matteo Staderini、Alessandra Monaco、Alberto López-Cobeñas、Salvatore Bongarzone、Xevi Biarnés、Pilar López-Alvarado、Nieves Cabezas、Maria Caramelli、Paolo Carloni、J. Carlos Menéndez、Giuseppe Legname
DOI:10.1002/cmdc.201000133
日期:——
Prion diseases are fatal neurodegenerative and infectious disorders for which effective pharmacological tools are not yet available. This unmet challenge and the recently proposed interplay between prion diseases and Alzheimer's have led to a more urgent demand for newantiprion agents. Herein, we report the identification of a novel bifunctional diketopiperazine (DKP) derivative 1 d, which exhibits
Synthesis and spectroscopic investigation of substituted piperazine-2,5-dione derivatives
作者:Craig D. Stewart、Nicholas G. White、Russell A. Barrow、Tristan A. Reekie
DOI:10.1016/j.tet.2024.133838
日期:2024.3
methods for accessing substituted piperazine-2,5-diones involve cyclising dipeptides or building from the already established core. Utilising the latter method, we have developed procedures to condense a variety of methoxylated benzaldehydes to exclusively form ()-(benzylidene)piperazine-2,5-diones . This method can easily be utilised to form both homo- and heterodimeric substituted piperazine-2,5-diones
哌嗪-2,5-二酮部分是用于功能化以产生生物活性分子的有用支架。获得取代的哌嗪-2,5-二酮的合成方法涉及环化二肽或从已经建立的核心构建。利用后一种方法,我们开发了将各种甲氧基化苯甲醛缩合以专门形成()-(亚苄基)哌嗪-2,5-二酮的程序。该方法可以很容易地用于形成同二聚体和异二聚体取代的哌嗪-2,5-二酮。将这些化合物进行氢化得到两种异构体。我们详细介绍了简单的核磁共振分析,可以识别 或 异构体。这些分析与 X 射线晶体学相结合表明,在所用的氢化条件下,异构体形成为主要产物。合成方法与光谱分析相结合,为我们提供了对 2,5-哌嗪二酮性质的宝贵了解。
Solution-phase combinatorial synthesis and evaluation of piperazine-2,5-dione derivatives
作者:Wendy A. Loughlin、Raymond L. Marshall、Adelina Carreiro、Kathryn E. Elson
DOI:10.1016/s0960-894x(99)00634-4
日期:2000.1
An efficient one-pot synthesis of a 61-membered combinatorial chemistry library of piperazine-2,5-diones was accomplished. Results of combinatorial synthesis, purification, analysis, and biological evaluation are described. (C) 2000 Elsevier Science Ltd. All rights reserved.
Saframycin synthetic studies
作者:Thomas T. Shawe、Liebeskind Lanny S
DOI:10.1016/s0040-4020(01)86518-2
日期:1991.7
A conceptually simple and direct synthetic route to racemic saframycin B, a bis-isoquinoline quinone antitumor antibiotic, was studied relying on transformations of a key C-2 symmetric intermediate.
One-Pot α-Amidosulfone-Mediated Variation of the Pictet-Spengler Tetrahydroisoquinoline Synthesis, Suitable for Amide-Type Substrates
作者:Francisco J. Arroyo、Pilar López-Alvarado、A. Ganesan、J. Carlos Menéndez
DOI:10.1002/ejoc.201402487
日期:2014.9
development of Pictet–Spengler reactions from amide substrates is a challenging problem. We report here that the reaction between amide-type compounds (including carbamates, amides, ureas and diketopiperazines), aldehydes and p-toluenesulfinic acid constitutes an efficient method for the preparation of tetrahydroisoquinolines or pyrazino[2,1-b]isoquinolines. Unlike previously known methods, this one-pot Pictet–Spengler