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Triterpene derivatives of azadirachtin having insect antifeedant and growth inhibitory activity and a process for extracting such compounds from the neem plant

机译：具有昆虫拒食和生长抑制活性的印za素的三萜衍生物及其从印em植物中提取此类化合物的方法

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摘要

The invention discloses novel triterpene derivatives of azadirachtin of the formulae 2 to 11 of the drawings and a process for isolating new triterpene derivatives of azadirachtin from the various parts of the neem plant(Azadirachta indica A-Juss), which process comprises grinding the parts of the neem plant to get a powder, extracting the powder with a binary immiscible solvent consisting of one polar and another non-polar solvent in a ratio of 1:2 to obtain an extract, filtering the extract to get a filtrate having two layers, one layer containing lipids and the other layer containing the new triterpene derivatives of azadirachtin and water soluble constituents including sugars, separating the layers by known methods, concentrating the layer containing the new triterpenes of the formulae 2-11 including derivatives of azadirachtin and water soluble salts, treating the resultant concentrate with a polar solvent and if necessary, warm the concentrate having the solvent, and filtering/decanting the resultant solution to produce a filtrate containing the mixture of the new triterpene derivatives of azadirachtin. The lipid layer is concentrated in any known manner, the lipid concentrate is treated with a polar solvent, chilled to a temperature of 0° to -10° C. and filtered to produce a filtrate containing lipids. The new triterpene derivatives of azadirachtin are useful in suppressing the insect pest population below the econcmic threshold level by their antifeedant and growth inhibitory activities.

机译：本发明公开了附图式2至11的印za素的新三萜衍生物以及从印em植物的各个部位（印za素A-Juss）中分离印new素的新三萜衍生物的方法，该方法包括将印of的各部分研磨。印ne植物得到粉末，用由一种极性和另一种非极性溶剂以1：2的比例组成的二元不混溶溶剂提取粉末以获得提取物，过滤提取物得到具有两层的滤液，一层含有脂质的层和另一层含有印ach素的新三萜衍生物和水溶性成分（包括糖）的层，通过已知方法分离各层，浓缩包含式2-11的新三萜的层，其中包括印za素和水溶性盐，用极性溶剂处理所得浓缩物，如有必要，将含有溶剂的浓缩物温热，然后过滤/除去使所得溶液倾斜以产生包含印containing素新的三萜衍生物的混合物的滤液。脂质层以任何已知的方式浓缩，脂质浓缩物用极性溶剂处理，冷却至0℃至-10℃的温度并过滤以产生包含脂质的滤液。印za素的新的三萜衍生物通过其抗饲料和抑制生长的活性可用于将昆虫害虫种群抑制在经济阈值以下。

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公开/公告号US5663374A

专利类型
公开/公告日1997-09-02

原文格式PDF
申请/专利权人 COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH;
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申请/专利号US19960585239
发明设计人 MANDAKINI MORESHWAR KULKARNI;VIMAL SHANTARAM JOSHI;NAGARAJ RAMANUJ AYYANGAR;VIDYA SUDHIR BHAT;MUKUND GANGADHAR SANE;BHIMSEN ANNACHARYA NAGASAMPAGI;SUPADA RAMBHAU ROJATKAR;
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申请日1996-01-11
分类号A01N43/16;A01N31/02;C07C57/02;
国家 US
入库时间 2022-08-22 03:09:30

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