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    • 6. 发明申请
    • Method of Extraction of Catechin Type-A Proanthocyanidins
    • 儿茶素A型原花青素提取方法
    • US20080306141A1
    • 2008-12-11
    • US11971994
    • 2008-01-10
    • Jan Glinski
    • Jan Glinski
    • A61K31/352C07D311/62
    • C07D311/62
    • Catechin type-A proanthocyanidins are recovered from cinnamon bark or other sources rich in catechin type-A proanthocyanidins by extraction with a first organic solvent to provide an extract rich in catechin type-A proanthocyanidins. This extract is combined with water and the organic solvent is removed by distillation so that proanthocyanidins are transferred to the aqueous phase with the precipitation of hydrophobic materials. The aqueous extract is further purified by contact with a second organic solvent that is immiscible with water and appropriate polarity to remove reddish colored, higher polymeric proanthocyanidins from the aqueous phase. The purified aqueous extract is then subjected to evaporative concentration to produce a first solid extract. Extraction of the first solid extract with dry acetone produces an organic extract which, upon removal of the acetone, produces a solid which is enriched in catechin type-A proanthocyanidins. Purity is increased by about another 20%. This purified extract is water-soluble and is free, or essentially free, of typical cinnamon aroma compounds.
    • 通过用第一种有机溶剂萃取,从肉桂皮或其它来源丰富的儿茶素A型原花青素中回收儿茶素A型原花青素,提供富含儿茶素A型原花色素的提取物。 将该提取物与水结合,通过蒸馏除去有机溶剂,使原花色素转移到水相中,沉淀疏水性材料。 通过与第二有机溶剂接触进一步纯化含水萃取物,所述第二有机溶剂与水不混溶并具有合适的极性,以从水相中除去带红色的较高级聚合物原花色素。 然后将纯化的水提取物进行蒸发浓缩以产生第一固体提取物。 用干丙酮提取第一固体提取物产生有机提取物,其在除去丙酮后产生富含儿茶素A型原花色素的固体。 纯度增加了约20%。 这种纯化的提取物是水溶性的,并且是游离的或基本上没有的典型的肉桂芳香化合物。