The present invention relates to a process for extracting an alkaloid. Particularly, the present invention relates to a process for extracting Rauwolscine from plant parts of Rauwolfia genus. Specifically, the present invention relates to a process for extracting Rauwolscine with an enhanced purity i.e. >95%.

The present invention relates to a process for extracting an alkaloid. Particularly, the present invention relates to a process for extracting Rauwolscine from plant parts of Rauwolfia genus. Specifically, the present invention relates to a process for extracting Rauwolscine with an enhanced purity i.e. >95%.

Methods that may be used for the manufacture of a class of chemical compounds known as terpenoid indole alkaloids, including tabersonine and catharanthine are provided. Compositions useful for the synthesis of terpenoid indole alkaloids, including tabersonine and catharanthine are also provided. The provided compounds are useful in the manufacture of chemotherapeutic agents.

The present invention relates to novel antitumor agents and pharmaceutically acceptable salts thereof, processes and intermediates for the manufacture of these novel constrained cyclic frameworks of general formula I and II, and medicaments containing such compounds.

The present invention relates to novel antitumor agents and pharmaceutically acceptable salts thereof, processes and intermediates for the manufacture of these novel constrained cyclic frameworks of general formula I and II, and medicaments containing such compounds.

The present invention relates to a process for extracting an alkaloid. Particularly, the present invention relates to a process for extracting Rauwolscine from plant parts of Rauwolfia genus. Specifically, the present invention relates to a process for extracting Rauwolscine with an enhanced purity i.e. >95%.

Present invention discloses a novel, commercially viable process for extraction of Alpha yohimbine from the bark, stem and leaves of Rauwolfia species. The extract is obtained by a precipitation method involving alternate steps of acidification and alkalization along with use of specific organic solvents. The extract gives higher yield of 7-8 fold as compared to other processes and without use of any column chromatography at all. Yield of alpha yohimbine from roots and leaves of Rauwolfia canescens by process of present invention was 0.017% and 0.4% respectively, indicating that leaves are a much better source. The HPLC analysis of the compound obtained indicated a purity of >90%.

Present invention discloses a novel, commercially viable process for extraction of Alpha yohimbine from the bark, stem and leaves of Rauwolfia species. The extract is obtained by a precipitation method involving alternate steps of acidification and alkalization along with use of specific organic solvents. The extract gives higher yield of 7-8 fold as compared to other processes and without use of any column chromatography at all. Yield of alpha yohimbine from roots and leaves of Rauwolfia canescens by process of present invention was 0.017% and 0.4% respectively, indicating that leaves are a much better source. The HPLC analysis of the compound obtained indicated a purity of >90%.

Present invention discloses a novel, commercially viable process for extraction of Alpha yohimbine from the bark, stem and leaves of Rauwolfia species. The extract is obtained by a precipitation method involving alternate steps of acidification and alkalization along with use of specific organic solvents. The extract gives higher yield of 7-8 fold as compared to other processes and without use of any column chromatography at all. Yield of alpha yohimbine from roots and leaves of Rauwolfia canescens by process of present invention was 0.017% and 0.4% respectively, indicating that leaves are a much better source. The HPLC analysis of the compound obtained indicated a purity of >90%.

Present invention discloses a novel, commercially viable process for extraction of Alpha yohimbine from the bark, stem and leaves of Rauwolfia species. The extract is obtained by a precipitation method involving alternate steps of acidification and alkalization along with use of specific organic solvents. The extract gives higher yield of 7-8 fold as compared to other processes and without use of any column chromatography at all. Yield of alpha yohimbine from roots and leaves of Rauwolfia canescens by process of present invention was 0.017% and 0.4% respectively, indicating that leaves are a much better source. The HPLC analysis of the compound obtained indicated a purity of >90%.