Infrared Absorption Band Assignment in Benzanilide and Some of its p-Substituted Derivatives

ChemSearch Journal Pub Date : 2014-01-01 DOI:10.4314/CSJ.V5I2

N. Ufaruna

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引用次数: 6

Abstract

The phytochemical screening of extracts from Euphorbia balsamifera was carried out, and the results revealed that the stem bark contains alkaloids, tannins, flavonoids, saponins, glycosides, terpenoids and sterols. The ethanol extract of the stem bark of Euphorbia balsamifera (commonly known as Ayyara in Hausa) was sequentially partitioned with petroleum ether, chloroform, ethyl acetate and methanol. The extracts were respectively labeled EB1, EB2, EB3, and EB4, with the ethanolic extract labeled EB. The extracts, 12.5% and 25% w/v, were tested for repellency against Anopheles gambiae , and the repellent activity was assessed using the human-bait technique. Five volunteers participated in the laboratory tests to ascertain the repellent activity of the extracts, and each volunteer was test with one extract, with each test repeated in triplicate. The chloroform extract labeled EB1-02 was found to be the most active, (97.2% and 100% repellency), while the extract labeled EB1-03 recorded the least activity of 32.4% and 21.6%. It can be concluded that the chloroform extract labeled EB1-02 is responsible for repellent activity of Euphorbia balsamifera. Keywords: Anopheles gambiae, Euphorbia balsamifera extracts, Human-bait technique, Phytochemicals, Repellency

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苯甲苯胺及其部分p取代衍生物的红外吸收谱带分配

试图对苯甲苯胺及其对甲基、对氯、对溴、对羧基和对硝基衍生物的红外光谱进行完整的红外波段分配。在源于肽链- CONH -耦合振动的六个特征酰胺带中，已为所有研究的化合物指定了四个酰胺带(酰胺I, II, III和V)。未取代的苯甲苯胺和对硝基苯甲苯胺仅分配了aiide IV波段。然而，没有观察到所有的苯甲苯胺都能容易地归因于酰胺VI模式的吸收带。关键词:苯甲苯胺;红外吸收

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ChemSearch Journal

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