Preparation method of ginkgolide K
A ginkgolide, reaction technology, applied in the field of compound preparation, can solve the problems of ginkgolide K content scarcity, high cost, lack of practical application value, etc., and achieve the effect of simple reaction conditions and high yield of finished products
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Embodiment 1
[0013] Take 10g of ginkgolide B, add 10ml of concentrated hydrochloric acid, oil bath at 110°C, react for 12 hours, filter to obtain the crude product, add an appropriate amount of ethanol to crystallize, and obtain ginkgolide K.
Embodiment 2
[0015] Take 10g of ginkgolide B, add 15ml of concentrated sulfuric acid, put it in a water bath at 90°C, react for 24 hours, filter to obtain the crude product, add an appropriate amount of methanol to crystallize, and obtain ginkgolide K.
Embodiment 3
[0017] Take 10g of ginkgolide B, add 30ml of concentrated sulfuric acid, put it in a water bath at 100°C, react for 16 hours, filter to obtain the crude product, add NaOH to adjust the pH to 5.0, add an appropriate amount of methanol to crystallize, and obtain ginkgolide K.
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