Ethyl indole-2-carboxylate (1a) and its derivatives were reacted with various carboxylic acids by using trifluoroacetic anhydride and phosphoric acid (or polyphosphoric acid) to yield effectively the corresponding ethyl 3-acylindole-2-carboxylates (3). However, strongly acidic carboxylic acids and nitrogen-containing carboxylic acids were poor acylating agents. Ethyl 3-acylindole-2-carboxylate (3) could easily be converted to 3-acylindole (5)
Friedel–Crafts Fluoroacetylation of Indoles with Fluorinated Acetic Acids for the Synthesis of Fluoromethyl Indol-3-yl Ketones under Catalyst- and Additive-Free Conditions
indoles is reported. The reaction uses fluorinated acetic acids as the fluoroacetylation reagents to synthesize diverse fluoromethyl indol-3-yl ketones in good yields under catalyst- and additive-free conditions. In addition, the only byproduct is water in this transformation. The synthetic utility of this reaction was also demonstrated by the concise synthesis of α-(trifluoromethyl)(indol-3-yl)methanol
作者:Antonio Cipiciani、Sergio Clementi、Gianfranco Giulietti、Gianlorenzo Marino、Gianfranco Savelli、Paolo Linda
DOI:10.1039/p29820000523
日期:——
The mechanism of the reaction between substituted indoles and trifluoroacetic anhydride has been studied by product identification and n.m.r. spectroscopy. Experimental evidence is given for the stability of an ion pair intermediate.
Direct Fluoroacylation of Indole with Perfluoroalkyl Iodides
作者:Guizhao Wang、Nianhua Yu、Ying Wen、Faqiang Leng
DOI:10.1021/acs.orglett.3c02148
日期:2023.7.28
perfluoroalkyl compounds has shown huge potential in synthetic chemistry and drug development. Herein, we report a one-pot tandem perfluoroalkylation–defluorination reaction of indole, perfluoroalkyl iodide, and water in the presence of Na2S2O4. A wide array of indole derivatives were efficiently accessed with good yields under mild reaction conditions. The reaction is believed to undergo perfluoroalkylation
全氟烷基化合物的官能化在合成化学和药物开发中显示出巨大的潜力。在此,我们报道了吲哚、全氟烷基碘和水在Na 2 S 2 O 4存在下的一锅串联全氟烷基化-脱氟反应。在温和的反应条件下,可以有效地获得多种吲哚衍生物,并具有良好的收率。据信该反应经历全氟烷基化并遵循脱氟水解途径。这项研究代表了一种脱氟功能化的替代方法。
Efficient Synthesis and Biological Activity of Novel Indole Derivatives as VEGFR-2 Tyrosine Kinase Inhibitors
作者:C. Zhang、D. Xu、J. Wang、C. Kang
DOI:10.1134/s1070363217120465
日期:2017.12
A series of novel indole derivatives were synthesized as potent inhibitors for the vascular endothelial growth factor receptor 2 (VEGFR-2) tyrosine kinase. Among those, compound 10b demonstrated the highest growth inhibition rate of 66.7% against the VEGFR-2 tyrosine kinase at 10 mu M which indicates that indole-benzothiazole might be the favorable structure. The binding mode of compound 10b with VEGFR-2 tyrosine kinase was evaluated by molecular docking.