Extracting method and new usage of chalcone in Coreopsis grandiflora

A technology of coreopsis and mesochalcone, which is applied in the fields of chemistry and agriculture, and can solve problems such as no biological activity

Inactive Publication Date: 2012-11-07
QINGDAO AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although Calanasan et al. have previously obtained from Wedelia plants Wedelia asperrima The compound was isolated

Method used

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  • Extracting method and new usage of chalcone in Coreopsis grandiflora
  • Extracting method and new usage of chalcone in Coreopsis grandiflora
  • Extracting method and new usage of chalcone in Coreopsis grandiflora

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1 Extraction of compound 2',4',4-trihydroxy-3',3-dimethoxychalcone

[0020] 5000g coarse powder of dried flowers of Coreopsis grandiflora was soaked and extracted with 95% ethanol for 3 times for 3d, 5d and 7d. After the extracts were combined, the solvent was recovered under reduced pressure to obtain 1140 g of 95% ethanol extract. After 1140 g of 95% ethanol extract was added to 10 times the amount of distilled water to suspend, ethyl acetate was added to extract 4 times. After recovering the solvent, 172 g of ethyl acetate extract was obtained. Take 40g of ethyl acetate extract and chromatograph on silica gel column, and then use 2:1 and 1:1 volume ratio of petroleum ether + chloroform, pure chloroform, 100:1~1:5 volume ratio of chloroform + methanol and pure methanol. Gradient elution gave 2',4',4-trihydroxy-3',3-dimethoxychalcone as orange crystals. The spectral data of the structure identification of the above isolated compound 2',4',4-trihydroxy-3',3-d...

Example Embodiment

[0023] Experimental example 2 2',4',4-trihydroxy-3',3-dimethoxychalcone and its herbicidal activity in each extraction stage

[0024] 1) Experimental materials

[0025] Lettuce, amaranth, cucumber, wheat

[0026] 2) Experimental method

[0027] Agar method: After soaking the recipient plant seeds in a 0.2% sodium hypochlorite solution for 15 minutes, rinse them with tap water several times and soak them under running water to absorb water for about 3~5 hours, then wash them several times with distilled water and place them evenly on a square plate with a lid On the absorbent paper inside, drip distilled water until the seeds do not float, shading and place them in a fully intelligent artificial climate box (HP1000GS-B, Wuhan Ruihua Instrument and Equipment Co., Ltd.) to germinate until the radicle (or seed root) reaches 3 When ~5 mm, transplant to 0.5% agar gel (prepared 100 mL in advance and evenly dispensed into 3 small beakers) mixed with extracts of various stages. The extract...

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Abstract

The invention relates to the field of chemistry and agriculture, in particular to an extracting method of chalcone in Coreopsis grandiflora. The method includes taking Coreopsis grandiflora plant dry powder, extracting through ethanol and ethyl acetate, passing silica gel column chromatography, and sequentially using petroleum ether+chloroform, pure chloroform, chloroform+methanol and pure methanol to perform gradient eluting to obtain 2', 4', 4-three hydroxyl-3',3-dimethoxy chalcone. The invention further provides a new usage of 2', 4', 4-three hydroxyl-3',3-dimethoxy chalcone for weeding.

Description

technical field [0001] The invention relates to the fields of chemistry and agriculture, and specifically provides a method for extracting chalcones from Coreopsis grandiflora and its application. Background technique [0002] Coreopsis grandiflora ( Coreopsis grandiflora Hogg.) also known as Cosmos genus, Coreopsis angustifolia and Coreopsis phoenix leaf, is a perennial herbaceous plant of the genus Coreopsis in the family Asteraceae, native to the Americas, introduced to my country as an ornamental plant in 1938, and is one of the exotic weeds . The grass is resistant to barrenness, pollution, and strong fecundity, so it is planted in large quantities in many areas of our country, and escapes into wild weeds, with rich resources. [0003] Studies have shown that the volatile oil of the roots, stems and leaves of the plant has inhibitory effects on Escherichia coli, Staphylococcus aureus, and Bacillus megaterium (Li Xihong, Chen Rong, Ji Fujiang. Anhui Agricultural Scienc...

Claims

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Application Information

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IPC IPC(8): C07C49/84C07C45/78C07C45/80A01N35/04A01P13/00
Inventor 罗小勇赵姝
Owner QINGDAO AGRI UNIV
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