Synthesis of novel flavonoid alkaloids as α-glucosidase inhibitors
作者:Jing Zhen、Yujie Dai、Tom Villani、Daniel Giurleo、James E. Simon、Qingli Wu
DOI:10.1016/j.bmc.2017.07.055
日期:2017.10
A series of novelflavonoid alkaloids were synthesized with different flavonoids and attached nitrogen-containing moieties. These new compounds were screened for inhibitory activity of α-glucosidase, among which compound 23 was found to show the lowest IC50 of 4.13 μM. Kinetic analysis indicates that the synthesized compounds 15 and 23 inhibit the enzyme in a non-competitive model with Ki value of
NOVEL PEPERIDINE-FLAVAN ALKALOID COMPOUNDS DERIVED FROM AFRICAN HERB TEA KINKELIBA AS ANTI-DIABETIC AGENTS
申请人:Simon James E.
公开号:US20130143921A1
公开(公告)日:2013-06-06
This invention provides the methods of separation and identification of a novel type of piperidine flavan alkaloids from an African herbal tea, the leaves of
Combretum micranthum
commonly known as kinkeliba, and the procedures for preparing the total piperidine flavan alkaloids (TPFA). In particular, this invention relates to the use of the plant extract that may contain TPFA as anti-diabetic agents in treatment of metabolic disorders and other applications related to this new chemical structure and derivatives thereof.
Peperidine-flavan alkaloid compounds derived from African herb tea kinkeliba as anti-diabetic agents
申请人:Simon James E.
公开号:US08642769B2
公开(公告)日:2014-02-04
This invention provides the methods of separation and identification of a novel type of piperidine flavan alkaloids from an African herbal tea, the leaves of Combretum micranthum commonly known as kinkeliba, and the procedures for preparing the total piperidine flavan alkaloids (TPFA). In particular, this invention relates to the use of the plant extract that may contain TPFA as anti-diabetic agents in treatment of metabolic disorders and other applications related to this new chemical structure and derivatives thereof.
The screening of the ICSN chemical library on various disease-relevant protein kinases led to the identification of natural flavonoidal alkaloids of unknown configuration as potent inhibitors of the CDK1 and CDK5 kinases. We thus developed an efficient and modular synthetic strategy for their preparation and that of analogues in order to determine the absolute configuration of the active natural flavonoidal alkaloids and to provide further insights on the structure-activity relationships in this series. The structural determinants of the interaction between some flavonoidal alkaloids with specific kinases were also evaluated using molecular modeling.
An Efficient One-Step Synthesis of Piperidin-2-yl and Pyrrolidin-2-yl Flavonoid Alkaloids through Phenolic Mannich Reactions
作者:Thanh Binh Nguyen、Qian Wang、Françoise Guéritte
DOI:10.1002/ejoc.201101312
日期:2011.12
An efficient one-stepsynthesis of piperidin-2-yl and pyrrolidin-2-yl flavonoid alkaloids was achieved in good to excellent yields by a highly regioselective phenolic Mannich reaction of chrysin with cyclic imines or iminium salts. Performing the reaction in a mixture of H2O/THF in the absence of an external reagent afforded the C-6 alkylated product exclusively. The same reaction in water in the presence