共查询到18条相似文献,搜索用时 62 毫秒
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以自制的漆原镍作催化剂,在45℃常压下将间硝基三氟甲苯氢化还原为间三氟甲基苯胺,收率达98%,催化剂能重复使用9次。 相似文献
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对苯二酚合成方法的研究进展 总被引:10,自引:0,他引:10
对苯二酚是一种重要的化工原料和中间体。本文综述了目前国内外对苯二酚合成方法的研究进展,特别对苯酚过氧化氢羟基化法这一洁净合成方法及其所用催化剂的种类和性能进行了较为详尽的综述。 相似文献
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间-苯氧基甲苯的合成 总被引:1,自引:0,他引:1
合成拟除虫菊酯是近年来最引入注目的一类杀虫剂,间苯氧基甲苯是合成除虫菊酯的一个重要中间体,其合成方法的研究和生产工艺流程的改进是一个十分重要的课题。最近十年来,关于间苯氧基甲苯的合成方法曾有过一些专利报道。例如④日本和西德曾有人加将间甲 相似文献
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黄酮是一类具有抗炎,抗菌,抗病毒等作用的化合物.本文综述了黄酮类化合物的重要合成方法及其最新发展. 相似文献
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《Analytical letters》2012,45(6):603-611
Abstract A new absorptiometric procedure for the determination of quintomycin sulphate in complex galenical mixtures is proposed, based on the reaction of the sample compound with a mineral acid-containing phloroglucinol solution. Absorbance readings at 448 nm obey Lambert-Beer's law within the concentration range from 4. 0 to 32. 0 μg ml?1. The method is operationally simple and has a good precision and an adequate selectivity. 相似文献
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S. P. Bondarenko A. V. Levenets M. S. Frasinyuk V. P. Khilya 《Chemistry of Natural Compounds》2003,39(3):271-275
Analogs of the natural isoflavonoids biochanin A and orobol were synthesized. Alkylation involving phenolic hydroxyls and the chromone ring was studied. 相似文献
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The antidepressant activity of Hypericum perforatum extracts has sparked great interestin the chemistry and biochemistry of its constitUents, generating coverage also on themainstream press'. The major limitation to a rational exploitation of the medicinalpotential of this plant is our still incomplete knowledge of its active constitUents. In the1970s, Rusian workers described the isolation and characterization of one activeconstitUent named hyperforin (l) from Hypericum perforatum'". Then … 相似文献
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SongGAO ShiShanYU DeQuanYU 《中国化学快报》2004,15(3):313-315
Two new phloroglucinol glycosides, lysidiciside A (1) and lysidiciside B (2), were isolated from the roots of Lysidice rhodostega Hance. Their structures were determined as 1-[(3-methylbutyryl)phloroglucinol]-β-D- glucopyranoside (1), 1-[(3-methylbutyryl)phloro-glucinol]-β-D-glucopyranosyl-5-O-β-D-glucopyranoside (2) on the basis of chemical and spectral analysis. 相似文献