Bulk heterojunction solar cells are among the most promising organic solar cells (OSCs). One of the two important parts of OSCs are acceptors, and the development of the design and synthesis of non-fullerene acceptors involves an electron-deficient heterocyclic central core and anchor acceptor malonitrile derivatives of 3-methylene-2,3-dihydro-1H-inden-1-ones. In this communication, an intermediate for the synthesis of this compound, 1-(dicyanomethylene)-3-hydroxy-1H-indene-2-carboxylic acid, was prepared by the Perkin reaction of 2-(3-oxoisobenzofuran-1(3H)-ylidene)malononitrile with tert-butyl acetoacetate in the presence of acetic anhydride and triethylamine. The structure of the newly synthesized compound was established by means of elemental analysis, high-resolution mass spectrometry, 1H NMR, 13C NMR and IR spectroscopy, and mass spectrometry.

中文翻译：

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1-(二氰基亚甲基)-3-羟基-1H-茚-2-甲酸


体异质结太阳能电池是最有前途的有机太阳能电池（OSC）之一。 OSC的两个重要部分之一是受体，非富勒烯受体的设计和合成的发展涉及缺电子杂环中心核和锚定受体3-亚甲基-2,3-二氢-1H-的丙二腈衍生物。茚-1-酮。在这篇文章中，通过2-(3-氧代异苯并呋喃-1(3H)的Perkin反应制备了用于合成该化合物的中间体1-(二氰亚甲基)-3-羟基-1H-茚-2-羧酸。 (亚基)丙二腈与乙酰乙酸叔丁酯在乙酸酐和三乙胺存在下反应。通过元素分析、高分辨率质谱、1H NMR、13C NMR、IR光谱和质谱确定了新合成化合物的结构。