会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 4. 发明授权
    • Process for the isolation of alkaloid components from the plant Vinca
Rosea L.
    • 从植物中分离生物碱成分的方法长春花
    • US4172077A
    • 1979-10-23
    • US908584
    • 1978-05-22
    • Karola JovanovicsGyorgy FeketeEszter DezseriLajos DancsiCsaba LorinczBela SzarvadyGyorgy DoboCsaba SzantayLajos Szabo
    • Karola JovanovicsGyorgy FeketeEszter DezseriLajos DancsiCsaba LorinczBela SzarvadyGyorgy DoboCsaba SzantayLajos Szabo
    • C07D471/18C07D471/20C07D471/22C07D519/04C07D215/00C07G5/00
    • C07D519/04
    • Tumor inhibiting alkaloids are recovered from Vinca Rosea L. by a method which comprises extracting the dried leaves with a solvent selected from the group consisting of an alkanol having 1 to 5 carbon atoms, a mixture of an alkanol having 1 to 5 carbon atoms and a dilute, aqueous solution, benzene and benzene homologs; subsequently purifying the alkaloid extract obtained by a phase-change method between immiscible solvents, precipitating the main amount of dimeric alkaloids in form of their sulphuric acid addition salts, isolating leurosine, vincistine, vinblastine, desacetoxy-vinblastine, N-desmethyl-vinblastine and desacetyl-vinblastine from the salt mixture obtained, and then completing the separation and isolation of the remaining alkaloids by separation and isolation by adjusting the pH-value of the mother liquor, after precipitation and removal of the salt mixture, to 5.5 to 10, extracting the solution with a water-immiscible organic solvent and separating vindoline, catharantine, 3',4' -anhydrovinblastine and leurosine from the extract by chromatography, extracting vindoline in the pH-range of 2.5 to 3.5 and catharantine 3',4'-anhydrovinblastine and leurosine in the pH-range of 5 to 6 with benzene or a benzene homologue, from the mother liquor obtained when isolating the salt mixture, and separating a mixture of leurosine and 3',4'-anhydrovinblastine by crystallization, epoxidizing this mixture with an oxygen source, or separating the mixture into its components by chromatography, and subsequently epoxidizing the 3',4'-anhydrovinblastine component to leurosine, and isolating catharantine remaining from the mother liquor obtained when separating the crystalline mixture, or separating the extract containing catharantine, 3',4'-anhydrovinblastine and leurosine into its components by chromatography.
    • 通过包括用选自具有1至5个碳原子的链烷醇,具有1至5个碳原子的链烷醇和1至5个碳原子的链烷醇的溶剂萃取干燥叶子的方法从长春花(Vinca Rosea L.)回收肿瘤抑制生物碱 稀释水溶液,苯和苯同系物; 随后将不相溶溶剂之间的相变法获得的生物碱提取物纯化,以其硫酸加成盐的形式沉淀出主要量的二聚生物碱,分离出白蛋白,长春新碱,长春花碱,去乙酰氧基 - 长春花碱,N-去甲基长春花碱和去乙酰基 从所得的盐混合物中分离并分离残留的生物碱,然后通过调节沉淀和除去盐混合物后的pH值,分离和分离,得到5.5〜10 溶液与水不混溶的有机溶剂混合,并通过色谱法从提取物中分离出vindoline,catharantine,3',4'-脱氢长春花碱和leurosine,在2.5至3.5的pH范围内提取vindoline,并检测3',4'-脱氢长春花碱和 柠檬酸在5〜6的pH范围内用苯或苯同系物,从分离盐混合物时得到的母液,和sepa 通过结晶评估白蛋白和3',4'-脱氢长春花碱的混合物,用氧源将该混合物环氧化,或通过色谱法将该混合物分离成其组分,随后将3',4'-脱氢长春花碱组分环氧化成亮氨酸,以及 隔离离开结晶混合物时获得的母液中残留的检疫物,或通过色谱法将含有检疫胺,3',4'-脱氢长春花碱和酪氨酸的提取物分离成其组分。