Radical-mediated dehydrative preparation of cyclic imides using (NH<sub>4</sub>)<sub>2</sub>S<sub>2</sub>O<sub>8</sub>–DMSO: application to the synthesis of vernakalant
作者:Dnyaneshwar N Garad、Subhash D Tanpure、Santosh B Mhaske
DOI:10.3762/bjoc.11.113
日期:——
efficient and new dehydrating reagent for a convenient one-pot process for the synthesis of miscellaneous cyclic imides in high yields starting from readily available primary amines and cyclic anhydrides. A plausible radical mechanism involving DMSO has been proposed. The application of this facile one-pot imide forming process has been demonstrated for a practical synthesis of vernakalant.
<i>N</i>
‐Aryl Amides as Chemical Exchange Saturation Transfer Magnetic Resonance Imaging Contrast Agents
作者:Xuekang Cai、Jia Zhang、Jiaqi Lu、Long Yi、Zheng Han、Shuixing Zhang、Xing Yang、Guanshu Liu
DOI:10.1002/chem.202002415
日期:2020.9.10
amides. As the first proof‐of‐concept study, we used CEST MRI to detect the enzymatic metabolism of the drug acebutolol directly by its intrinsic CEST signal without any chemical labeling. Our study implies that N‐aryl amides may enable the label‐free CEST MRIdetection of the metabolism of many N‐aryl amide‐containing drugs and a variety of enzymes that act on N‐aryl amides, greatly expanding the scope
化学交换饱和转移 (CEST) MRI 最近已成为一种通用的分子成像方法,其中可以利用抗磁性化合物生成 MRI 信号。为了扩大 CEST MRI 的应用范围,我们在此系统地研究了具有不同N芳族取代基的N芳基酰胺的 CEST 特性,揭示了它们的化学位移 (4.6–5.8 ppm) 和交换率(高达数千 s -1)与烷基酰胺相比,更适合用作 CEST 试剂。作为第一个概念验证研究,我们使用 CEST MRI 直接通过其固有的 CEST 信号检测药物醋丁洛尔的酶代谢,无需任何化学标记。我们的研究表明N芳基酰胺可能使许多含N-芳基酰胺的药物和作用于N-芳基酰胺的多种酶的代谢的无标记CEST MRI检测成为可能,极大地扩展了CEST MR分子成像的范围。
Balasubramaniyan, V.; Argade, N. P., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1988, vol. 27, # 1-12, p. 906 - 908
作者:Balasubramaniyan, V.、Argade, N. P.
DOI:——
日期:——
Nematode Signaling Molecules Derived from Multimodular Assembly of Primary Metabolic Building Blocks
作者:Joshua J. Yim、Neelanjan Bose、Jan M. Meyer、Ralf J. Sommer、Frank C. Schroeder
DOI:10.1021/acs.orglett.5b00329
日期:2015.4.3
In the nematode model organisms Caenorhabditis elegans and Pristionchus pacificus, a new class of natural products based on modular assembly of primary-metabolism-derived building blocks control organismal development and behavior. We report identification and biological activities of the first pentamodular metabolite, pasa#9, and the 8-oxoadenine-containing npar#3 from P. pacificus. These structures suggest co-option of nucleoside and tryptophan metabolic pathways for the biosynthesis of endogenous metabolite libraries that transcend the dichotomy between primary and secondary metabolism.
BALASUBRAMANIYAN, V.;PARGADE, N., INDIAN J. CHEM. B, 27,(1988) N0, C. 906-908