Preparation method of castanospermine
A suspension, macroporous resin technology, applied in organic chemistry and other directions, can solve rare problems and achieve the effect of less sample loss, strong separation ability, and time period
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Embodiment 1
[0021] Take 1kg of dried leaves of Dahuabudou, crush them into coarse powder, mix them with 10kg of 75% ethanol solution, suspend them by cavitation for 30 minutes, perform negative pressure cavitation suspension solid-liquid extraction twice to obtain the extract, and concentrate to density 1.2g / ml to obtain total alkaloid extract, add D101 type macroporous resin to the extract, mix well, dry, then pack into column, wash with water until the color is light, and then wash with 85% ethanol solution of 6 times column volume Detach, TLC detection, collect the target fraction, and concentrate to obtain the crude product.
[0022] Take chloroform-methanol-water and put it in a separatory funnel according to the volume ratio (5:15:6), mix well, let it stand, release the upper layer as the stationary phase, and the lower layer as the mobile phase, dissolve the crude product in the lower phase, and start the preparation Type high-speed countercurrent chromatograph, first pump the stat...
Embodiment 2
[0024] Take 2kg of dried leaves of Dahuabudou, crush them into coarse powder, mix them with 20kg of 75% ethanol solution, suspend them by cavitation for 30 minutes, perform negative pressure cavitation suspension solid-liquid extraction twice to obtain the extract, and concentrate to density 1.2g / ml, to get the total alkaloid extract, add D101 macroporous resin to the extract, mix well, dry and pack into a column, first wash with water until the color is light, and then wash with 85% ethanol solution 5 times the column volume Detach, TLC detection, collect the target fraction, and concentrate to obtain the crude product.
[0025] Take chloroform-methanol-water and put it in a separatory funnel according to the volume ratio (9:17:8), mix well, let it stand still, release the upper layer as the stationary phase, and the lower layer as the mobile phase, dissolve the crude product in the lower phase, and start the preparation Type high-speed countercurrent chromatograph, first pum...
Embodiment 3
[0027] Take 2kg of dried leaves of Dahuabudou, crush them into coarse powder, mix them with 20kg of 75% ethanol solution, suspend them by cavitation for 30 minutes, perform negative pressure cavitation suspension solid-liquid extraction twice to obtain the extract, and concentrate to density 1.1g / ml, to get the total alkaloid extract, add D101 macroporous resin to the extract, mix well, dry and pack into a column, wash with water until the color is light, and then wash with 85% ethanol solution of 6 times the column volume Detach, TLC detection, collect the target fraction, and concentrate to obtain the crude product.
[0028] Take chloroform-methanol-water and place it in a separatory funnel according to the volume ratio (7:16:7), mix well, let it stand still, release the upper layer as the stationary phase, and the lower layer as the mobile phase, dissolve the crude product in the lower phase, and start the preparation Type high-speed countercurrent chromatograph, first pump...
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