Spiro‐acridine/indoline and indoline derivatives were synthesized by the three‐component reaction of isatin, dimedone, and amines or amino acids in the presence of acid‐functionalized multiwalled carbon nanotubes/La₂O₃ (MWCNTs)‐COOH/La₂O₃ hybrid (5 mol%) as a highly efficient catalyst in ethanol. The assigned structure was further established by CHN analysis, NMR, and FTIR spectra. (MWCNTs)‐COOH/La₂O₃ was fabricated by the reaction of functionalized (MWCNTs)‐COOH and La(NO₃)₃.6H₂O in acetic acid. Synthesis of La₂O₃ nanoparticles and their conjugation on the surface of MWCNT have been confirmed by FTIR, scanning electron microscopy, transmission electron microscopy, X‐ray diffraction, and energy‐dispersive X‐ray spectroscopy.

中文翻译：

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使用（MWCNT）-COOH / La2O3杂化物作为有效催化剂一锅合成螺ac啶/二氢吲哚和二氢吲哚衍生物

螺旋ac啶/二氢吲哚和二氢吲哚衍生物是在酸官能化的多壁碳纳米管/ La ₂ O ₃（MWCNTs）-COOH / La ₂ O的存在下由靛红，二甲酮和胺或氨基酸的三组分反应合成的₃杂化物（5摩尔％）作为乙醇中的高效催化剂。通过CHN分析，NMR和FTIR光谱进一步确定了指定的结构。（MWCNTs）-COOH / La ₂ O ₃是通过官能化（MWCNTs）-COOH与La（NO ₃）₃ .6H ₂ O在乙酸中的反应制备的。La ₂ O _3的合成 FTIR，扫描电子显微镜，透射电子显微镜，X射线衍射和能量色散X射线光谱学证实了纳米颗粒及其在MWCNT表面的结合。