在蓝光照射下,在 FeCl 3 ·6H 2 O 存在下,未活化的烯烃与实验室稳定的 NaN 3转化为烷基叠氮化物。所得产物具有抗马可夫尼科夫选择性,反应可以在空气和湿气存在的温和环境条件下进行。该转化表现出广泛的官能团耐受性,这使其适合复杂分子的官能化。进行机理研究以深入了解叠氮反应并揭示水合铁中的水作为氢原子源的作用。
Diversity Oriented Clicking (DOC): Divergent Synthesis of SuFExable Pharmacophores from 2‐Substituted‐Alkynyl‐1‐Sulfonyl Fluoride (SASF) Hubs
作者:Christopher J. Smedley、Gencheng Li、Andrew S. Barrow、Timothy L. Gialelis、Marie‐Claire Giel、Alessandra Ottonello、Yunfei Cheng、Seiya Kitamura、Dennis W. Wolan、K. Barry Sharpless、John E. Moses
DOI:10.1002/anie.202003219
日期:2020.7.20
Diversity Oriented Clicking (DOC) is a unified click‐approach for the modular synthesis of lead‐like structures through application of the wide family of click transformations. DOC evolved from the concept of achieving “diversity with ease” , by combining classic C−C π‐bond click chemistry with recent developments in connective SuFEx‐technologies. We showcase 2‐Substituted‐Alkynyl‐1‐Sulfonyl Fluorides
Triazole Ligands Reveal Distinct Molecular Features That Induce Histamine H<sub>4</sub> Receptor Affinity and Subtly Govern H<sub>4</sub>/H<sub>3</sub> Subtype Selectivity
作者:Maikel Wijtmans、Chris de Graaf、Gerdien de Kloe、Enade P. Istyastono、Judith Smit、Herman Lim、Ratchanok Boonnak、Saskia Nijmeijer、Rogier A. Smits、Aldo Jongejan、Obbe Zuiderveld、Iwan J. P. de Esch、Rob Leurs
DOI:10.1021/jm1013488
日期:2011.3.24
a peripheral imidazole group. The imidazole ring posed some problems in the click chemistry putatively due to Cu(II) coordination, but Boc protection of the imidazole and removal of oxygen from the reaction mixture provided effective strategies. Pharmacological studies revealed two monosubstituted imidazoles (6h,p) with <10 nM H4R affinities and >10-fold H4R/H3R selectivity. Both compounds possess
组胺H 3(H 3 R)和H 4(H 4 R)受体引起了药物化学界的极大兴趣。鉴于它们相对较高的同源性,但治疗前景却大相径庭,因此对两种受体的配体选择性至关重要。我们使用具有[1,2,3]三唑核心的配体询问H 4 R / H 3 R的选择性。Cu(I)辅助的“点击化学”被用来组装各种[1,2,3]三唑化合物(6a - w和7a - f),许多含有外围咪唑基团。咪唑环可能由于Cu(II)配位而在点击化学中造成了一些问题,但是咪唑的Boc保护和从反应混合物中除去氧气提供了有效的策略。药理研究表明,两种单取代的咪唑(6h,p)的亲和力<10 nM H 4 R和H 4 R / H 3 R选择性> 10倍。两种化合物均具有环烷基甲基,并且似乎靶向H 4中的亲脂性口袋R具有很高的空间精度。[1,2,3]三唑支架的使用进一步证明了以下概念,即间隔区长度或外围基团的简单改变可以逆转对H 3 R的选择性。提
Azoacetylenes for the Synthesis of Arylazotriazole Photoswitches
作者:Patrick Pfaff、Felix Anderl、Moritz Fink、Moritz Balkenhohl、Erick M. Carreira
DOI:10.1021/jacs.1c06014
日期:2021.9.15
TIPS-acetylene to aryldiazonium tetrafluoroborate salts gives a wide range of azoacetylenes, constituting an underexplored class of stable intermediates. In situ desilylation transiently leads to terminal arylazoacetylenes that undergo copper-catalyzed cycloadditions (CuAAC) with a diverse collection of organoazides. These include complex molecules derivedfrom natural products or drugs, such as colchicine
indexes [SI; calculated relative to the human dermal fibroblast (HDF) cell line], even higher than that of the reference compound cytarabine. Results of molecular docking studies of this type of macrolideantibiotics at the ribosomal tunnel, together with experimentally determined lipophilicity and aqueous solubility values, as well as biological assay data revealed the importance of the introduced functional
Ce(OTf)<sub>3</sub>-Catalyzed Multicomponent Reaction of Alkynyl Carboxylic Acids, <i>tert</i>-Butyl Isocyanide, and Azides for the Assembly of Triazole–Oxazole Derivatives
Cerium(III) triflate-catalyzed multicomponent reactions between alkynyl carboxylicacids, tert-butyl isocyanide, and organic azides have been developed. In the presence of Ce(OTf)3 (10 mol %), the cascade reaction of one molecule of alkynyl carboxylicacid with three molecules of tert-butyl isocyanides proceeds chemoselectively and regioselectively via a triple and ordered isocyanide insertion process