Preparation of sinomontanine and its hydrobromide
Preparation of sinomontanine A and its hydrobromic acid salt are disclosed. The procedure is carried out by crushing block root of Gaowutou, extracting by alcohol reflux or acid water leakage or alcohol immersion, concentrating to thin paste to obtain crude extract, acidifying crude extract to pH=1í...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | Preparation of sinomontanine A and its hydrobromic acid salt are disclosed. The procedure is carried out by crushing block root of Gaowutou, extracting by alcohol reflux or acid water leakage or alcohol immersion, concentrating to thin paste to obtain crude extract, acidifying crude extract to pH=1í½5, obtain acidified liquid, adsorbing the acidified liquid by exchange resin cation or macroporous adsorbing resin or alumina, washing by water, washing by chloroform or/and alcohol, collecting eluent, concentrating extractive, dissolving the extractive into alcohol, laying aside for 1 day, crystallizing and washing by alcohol to obtain final product. It has higher purity. |
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