Single-Step Synthesis of Iodinated Oxazoles from <i>N</i>-Propargyl Amides Mediated by I<sub>2</sub>/Iodosylbenzene/Trimethylsilyl Trifluoromethanesulfonate Systems
作者:Sho Suzuki、Akio Saito
DOI:10.1021/acs.joc.7b01563
日期:2017.11.17
trifluoromethanesulfonate (TMSOTf) is effective for single-step synthesis of iodinated oxazoles from N-propargyl amides via the aromatization of the iodocyclized intermediates, which has difficulty proceeding through conventional iodocyclization methods. Compared to the former method consisting of the metal-catalyzed cyclization of N-propargyl amides followed by halogenation of alkylideneoxazolines, the present
I 2,碘基苯和三甲基甲硅烷基三氟甲磺酸盐(TMSOTf)的组合可有效地通过碘化环化中间体的芳构化从N-炔丙基酰胺一步合成碘代恶唑。与由N-炔丙基酰胺的金属催化环化然后亚烷基亚恶唑啉卤化的前一种方法相比,本反应提供了一种简便且无金属的方法。
Functional Profiling, Identification, and Inhibition of Plasmepsins in Intraerythrocytic Malaria Parasites
作者:Kai Liu、Haibin Shi、Huogen Xiao、Alvin G. L. Chong、Xuezhi Bi、Young-Tae Chang、Kevin S. W. Tan、Rickey Y. Yada、Shao Q. Yao
DOI:10.1002/anie.200903747
日期:2009.10.19
Profile and eliminate! Plasmepsins (PMs), aspartic proteases required for malaria‐parasite growth, are promising antimalarial targets. The in situ screening of PMs with probes formed from β‐hydroxyazides 1 and alkynes with a photo‐cross‐linking unit and a tetraethylrhodamine reporter led to the identification of the small‐molecule inhibitor 2, which inhibits all four food‐vacuole PMs and showed potent
Dehydrogenative Cycloisomerization/Arylation Sequence of
<i>N</i>
‐Propargyl Carboxamides with Arenes by Iodine(III)‐Catalysis
作者:Yuki Umakoshi、Yusuke Takemoto、Akira Tsubouchi、Viktor V. Zhdankin、Akira Yoshimura、Akio Saito
DOI:10.1002/adsc.202200219
日期:2022.6.21
provides a facile and powerful approach to C−C bondformation between the generated heterocycles and unfunctionalized arenes. Here, we describe a hypervalent iodine(III)-catalyzed synthesis of oxazoles concomitant with the introduction of aryl groups into side chain from N-propargyl carboxamides and arenes, representing first C(sp3)−C(sp2) bondformation by the catalytic dehydrogenative cycloisomerization/arylation
Multifunctional multivalency: a focused library of polymeric cholera toxin antagonists
作者:Huu-Anh Tran、Pavel I. Kitov、Eugenia Paszkiewicz、Joanna M. Sadowska、David R. Bundle
DOI:10.1039/c0ob01089h
日期:——
the multivalent ligands is important for successful interaction with multimeric proteins. Polymer-based heterobifunctionalligands that contain pendant groups prearranged into heterodimers can be used to probe the active site and surrounding area of the receptor. Here we describe the synthesis and activities of a series of galactose conjugates on polyacrylamide and dextran. Conjugation of a second fragment