- A process for preparing high-content loni mork sandbank method
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The invention discloses a method for preparing high-content nemadectin and belongs to the technical field of organic chemistry. According to the method, crystallized and purified 5-O (protecting group)-23-Oxo nemadectin or 5-O (protecting group)-23-formaldoxime nemadectin is taken as the raw material, and the high-content nemadectin is obtained through deoximation, reduction, deprotection and silicagel column separation; the HPLC purity of the obtained nemadectin is larger than or equal to 95.0A%, and content is larger than or equal to 93.0wt.%. The method has the advantages that aftertreatment is easy, column separation frequency is low, and nemadectin content is high.
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