[EN] BETA-NAPHTHOISOFLAVONES, COMPOSITIONS CONTAINING, AND USES OF, SAME [FR] BÊTA-NAPHTHOISOFLAVONES, COMPOSITIONS CONTENANT CELLES-CI ET LEURS UTILISATIONS
for the preparation of bioactive compounds. Efficient methods to access these heterocycles are in urgent need. Herein, we report diversity-oriented synthesis of flavones and isoflavones from 3-iodochromones via palladium/norbornene cooperative catalysis. The success of this research relies on the use of a unique bridge-head ester modified norbornene derivative as the mediator. Salient features of this
Toward the Generation of 2-Amino-3-Formyl Difunctionalized Chromones via Pd-Enabled Rearrangement Strategy
作者:Qi Tong、Ren-Feng Xiu、Jia-He Chen、Yun Zhang、Bao-Dong Cui、Nan-Wei Wan、Yong-Zheng Chen、Wen-Yong Han
DOI:10.1021/acscatal.3c03282
日期:2023.10.6
Accomplished herein is a rearrangement strategy for the highly efficient assembly of synthetically cumbersome while medicinally significant 2-amino-3-formyl chromones via palladium-catalyzed ring-opening, rearrangement, and cyclization process. Such a sequence enables the formation of one C(sp2)–O bond and one C(sp2)–C(sp2) bond, and reconstruction of the benzo-γ-pyrone moiety in a single operation
Pd-catalyzed stereoselective synthesis of chromone C-glycosides
作者:Manish Kumar Sharma、Bindu Tiwari、Nazar Hussain
DOI:10.1039/d4cc00486h
日期:——
stereoselective synthesis of chromone C-glycosides from various glycals. We successfully applied this method to various glycals with different protecting groups, yielding the corresponding glycosides in 41–78% yields. Additionally, we investigated the potential of this approach for the late-stage modification of natural products and pharmaceutical compounds linked to glycals, leading to the synthesis of their
Copper-Mediated, Palladium-Catalyzed Cross-Coupling of 3-Iodochromones, Thiochromones, and Quinolones with Ethyl Bromodifluoroacetate
作者:Xiaodong Han、Zhizhou Yue、Xiaofei Zhang、Qian He、Chunhao Yang
DOI:10.1021/jo400412k
日期:2013.5.17
The palladium-catalyzed cross-coupling reaction of 3-iodochromones, thiochromones, and quinolones with ethyl bromodifluoroacetate in the presence of a copper mediator is reported. Under optimized conditions, all reactions worked well and provided difluoro-containing products in moderate to excellent yields.
Palladium-Catalyzed Domino Reaction for the Assembly of Norbornane-Containing Chromones with Dimethyl Squarate as the Solid C1 Source
作者:Fei Li、Hui-Min Li、Ren-Feng Xiu、Jin-Ke Zhang、Bao-Dong Cui、Nan-Wei Wan、Yong-Zheng Chen、Wen-Yong Han