Application of hederagenin derivative in preparation of medicine for resisting myocardial hypoxia-reoxygenation injury
A technology of hederagenin and myocardial hypoxia, which is applied in the directions of drug combination, steroids, cardiovascular system diseases, etc. Effects of survival rate, improved solubility, decreased MDA content
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example 1
[0057] The preparation of example 1 helexin
[0058] Take 1 kg of Dipsacus medicinal material, add 30 g of calcium oxide, and extract 3 times with 8 times the amount of 60% ethanol under reflux, each time for 2 hours. Combine the extracts three times, filter, and recover the ethanol from the filtrate until it has no alcohol smell, add water to 3000ml, pass through the treated macroporous resin column, and first elute with 20% ethanol containing sodium hydroxide (pH value 13) for 3 times column volume, then eluted with water to neutrality, and finally eluted with 70% ethanol for 4 times the column volume, collected the eluate, and concentrated to dryness under reduced pressure; hydrolyzed 3 times with 2N hydrochloric acid containing 40% ethanol solution Hour. Filtrate, discard the hydrolyzate, wash the filter cake with deionized water until it is neutral; then heat it to boiling with 95% ethanol, add 2% medicinal activated carbon of the volume of the liquid medicine, filter ...
example 43
[0063] Example 4 3β, 23-dihydroxyoleanane-12-ene-28 hydroxy acid-2-[4-(2-formylpyridine)-piperazinyl]-B Preparation of esters
[0064] Weigh 1.000 mmol compound 3β, 23-dihydroxyoleanane-12-ene-28 hydroxy acid-2-[4-(2-formylpyridine)-piperazinyl]-ethyl ester, dissolve with 50 mL dichloromethane , add 1.5mmol of 2-pyridinecarboxylic acid, then add 1.5mmol EDC·HCL, 1.5mmol HOBT successively, react at room temperature for 6h, after the reaction is complete, dilute the reaction solution with dichloromethane, wash the dichloromethane solution three times with water and saturated saline , 50 mL each time, dehydrated with anhydrous sodium sulfate, filtered, dried, separated on a silica gel column (chloroform:methanol=30:1), collected the same components, recovered the solvent, dried, and obtained.
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