Application of diarylpentane compound in herbicides
A technology of diarylpentane and arylpentane, applied in the field of application of diarylpentane compounds in herbicides, to achieve the effect of growth inhibition
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[0031] (1) Preparation method of compound 1
[0032] The present invention has no special limitation on the preparation method of the compound 1, which can be prepared by conventional preparation methods known in the art. In the embodiment of the present invention, the preparation method is preferably as follows:
[0033] Dried chamaejasma root (10kg) was cut and pulverized and leached three times with 95% ethanol (20 liters each time), the extracts were combined and concentrated under reduced pressure to obtain the extract; the above extract was suspended in 4 liters of alkaline water ( PH=10-12) water, extracted 5 times with chloroform (1 L each time), concentrated under reduced pressure to obtain chloroform extract (122 g). The chloroform extract was passed through a silica gel column (silica gel 200-300 mesh, the same below), and carried out gradient elution with an organic solvent (petroleum ether-ethyl acetate 40:1, petroleum ether-ethyl acetate 20:1, petroleum ether-eth...
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