Nickel-Catalyzed Reductive Cross-Coupling of <i>N</i>-Acyl and <i>N</i>-Sulfonyl Benzotriazoles with Diverse Nitro Compounds: Rapid Access to Amides and Sulfonamides
作者:Erdong Qu、Shangzhang Li、Jin Bai、Yan Zheng、Wanfang Li
DOI:10.1021/acs.orglett.1c03535
日期:2022.1.14
Herein we report a Ni-catalyzed reductive transamidation of conveniently available N-acyl benzotriazoles with alkyl, alkenyl, and aryl nitro compounds, which afforded various amides with good yields and a broad substrate scope. The same catalytic reaction conditions were also applicable for N-sulfonyl benzotriazoles, which could undergo smooth reductive coupling with nitroarenes and nitroalkanes to
在此,我们报道了一种方便获得的N-酰基苯并三唑与烷基、烯基和芳基硝基化合物的 Ni 催化还原转酰胺基反应,该反应以良好的收率和广泛的底物范围提供了各种酰胺。相同的催化反应条件也适用于N-磺酰基苯并三唑,它可以与硝基芳烃和硝基烷烃进行平滑的还原偶联,得到相应的磺酰胺。
Synthesis of Structurally Diverse Benzotriazoles via Rapid Diazotization and Intramolecular Cyclization of 1,2‐Aryldiamines
作者:Réka J. Faggyas、Nikki L. Sloan、Ned Buijs、Andrew Sutherland
DOI:10.1002/ejoc.201900463
日期:2019.9
mild conditions, using a polymer‐supported nitrite reagent and p‐tosic acid. The functional group tolerance of this approach was further demonstrated with effective activation and cyclization of N‐alkyl, ‐aryl, and ‐acyl ortho‐aminoanilines leading to the synthesis of N1‐substituted benzotriazoles. The synthetic utility of this one‐pot heterocyclization process was exemplified with the preparation of a
Higher‐energy collision‐induced dissociation for the quantification by liquid chromatography/tandem ion trap mass spectrometry of nitric oxide metabolites coming from
<i>S</i>
‐nitroso‐glutathione in an
<i>in vitro</i>
model of the intestinal barrier
numerous studies. In order to study its bioavailability after oral administration, which represents the most convenient route for the chronic treatment of CVDs, it is essential to develop an analytical method permitting (i) the simultaneous measurement of GSNO metabolites, i.e. nitrite, S‐nitrosothiols (RSNOs) and nitrate and (ii) to distinguish them fromother sources (endogenous synthesis and diet)
Reactive intermediates. Part IV. The amination of naphtho[1,8-de]-triazine
作者:C. W. Rees、R. C. Storr
DOI:10.1039/j39690000756
日期:——
Amination of naphtho[1,8-de]triazine with aqueous hydroxylamine-O-sulphonic acid gives 1-aminonaphtho-[1,8-de]triazine and 1-amino-8-azidonaphthalene. Amination with ethereal chloramine gives 1- and 2-aminonaphthotriazines and the latter was shown to rearrange to the amino-azide under the conditions of the hydroxylamine-O-sulphonic acid amination. Both 1 - and 2-aminotriazines are rearranged smoothly
用羟胺-O-磺酸水溶液胺化萘[1,8- de ]三嗪,得到1-氨基萘-[1,8- de ]三嗪和1-氨基-8-叠氮基萘。用醚化氯胺胺化得到1-和2-氨基萘三嗪,并且显示后者在羟胺-O-磺酸胺化的条件下重排成氨基叠氮化物。1-和3-氨基三嗪均被酸平滑地重排至氨基叠氮化物。将这些三嗪的稳定性与相关三唑的稳定性进行了比较,并提出了其重排的机理。
A two-photon excitable and ratiometric fluorogenic nitric oxide photoreleaser and its biological applications
We report a two-photon excitable nitric oxide photoreleaser with ratiometric fluorescence variation, its spatiotemporally controlled release and biological applications.