50548-43-1Relevant articles and documents
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Gilman,Swiss
, p. 1884 (1944)
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Synthesis method of 4-aminooxyfluorene
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Paragraph 0032; 0040-0041; 0044-0046; 0050-0052; 0055; ..., (2022/03/27)
The present invention discloses a method of synthesis of 4- aminooxyfluorene, in a solvent, oxene reacts with an organic base, nitrite to form 4-nitrosooxyfluorene, and then in the presence of a reducing agent, the nitroso is reduced to amino, to obtain the target product 4-aminooxyfluorene. The present invention by a strong base (sodium or potassium alcohol), nitrites and reducing agents, after two steps of reaction to synthesize 4-aminooxyfluorene, the reaction conditions are mild, simple, raw materials are inexpensive and readily available, less reaction by-products, high product yield, is conducive to industrial production.
An electroluminescent compound and an electroluminescent device comprising the same
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Paragraph 0415; 0422-0427; 0635; 0642-0647, (2020/09/12)
The present invention relates to organic light emitting compounds represented by chemical formula 1-1 to chemical formula 1-2. An organic electroluminescent device using the same has excellent light emitting efficiency and can be driven at low voltage, thereby having improved power efficiency and long life characteristics.COPYRIGHT KIPO 2015