Synthesis of heterocyclic-fused benzopyrans via the Pd(<scp>ii</scp>)-catalyzed C–H alkenylation/C–O cyclization of flavones and coumarins
作者:Yechan Kim、Youngtaek Moon、Dahye Kang、Sungwoo Hong
DOI:10.1039/c4ob00180j
日期:——
derivatives. The synthetic utility of the one-pot sequence was demonstrated by obtaining convenient access to coumarin-annelated benzopyrans. The reaction scope for the transformation was found to be fairly broad, affording good yields of a wide range of flavone- or coumarin-fused benzopyran motifs, which are privileged structures in many biologically active compounds.
METHODS OF DESIGNING, PREPARING, AND USING NOVEL PROTONOPHORES
申请人:Martineau Louis C.
公开号:US20140135359A1
公开(公告)日:2014-05-15
The present invention provides a computer-assisted method of generating a protonophore requiring the use of a computer including a processor. The method includes: designing the protonophore, calculating, using the processor, an estimated protonophoric activity; producing the protonophore if the estimated protonophoric activity corresponds to an U
50
of about 20 μM or less; and determining the uncoupling activity of the protonophore. The present invention also provides novel protonophores that meet the above requirement and their methods of use.
Efficient Synthesis of Frutinone A and Its Derivatives through Palladium-Catalyzed CH Activation/Carbonylation
作者:Yongje Shin、Changho Yoo、Youngtaek Moon、Yunho Lee、Sungwoo Hong
DOI:10.1002/asia.201402876
日期:2015.4
Frutinone A, a biologically active ingredient of an antimicrobial herbal extract, demonstrates potent inhibitory activity towards the CYP1A2 enzyme. A three‐step total synthesis of frutinone A with an overall yield of 44 % is presented. The construction of the chromone‐annelated coumarin core was achieved through palladium‐catalyzed CHcarbonylation of 2‐phenolchromones. The straightforward synthetic