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.
A New Method for the Facile Synthesis of Hydroxylated Flavones by Using Allyl Protection
作者:B. R. Nawghare、S. S. Sakate、P. D. Lokhande
DOI:10.1002/jhet.1580
日期:2014.3
iodine‐induced oxidative cyclization of 2′‐hydroxychalcones provides a simple, highly efficient approach to various hydroxy flavones and analogues. This process is run under mild conditions, tolerates various functional groups, and provides hydroxy flavones in good to excellent yield. The allyl‐protected acetophenones and benzaldehydes were smoothly deallylated under similar conditions.
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
Parikh; Shah, Journal of the Indian Chemical Society, 1959, vol. 36, p. 729
作者:Parikh、Shah
DOI:——
日期:——
Synthesis of heterocyclic-fused benzofurans via C–H functionalization of flavones and coumarins
作者:Youngtaek Moon、Yechan Kim、Hyerim Hong、Sungwoo Hong
DOI:10.1039/c3cc44456b
日期:——
An efficient method to effect C-O cyclization was developed via the C-H functionalization of chromones and coumarins, affording heterocyclic-fused benzofurans.