Benzylic C–H heteroarylation of <i>N</i>-(benzyloxy)phthalimides with cyanopyridines enabled by photoredox 1,2-hydrogen atom transfer
作者:Long-Jin Zhong、Hong-Yu Wang、Xuan-Hui Ouyang、Jin-Heng Li、De-Lie An
DOI:10.1039/d0cc03619f
日期:——
A visible light initiated α-C(sp3)–H arylation of N-(benzyloxy)phthalimides with cyanopyridines for the construction of highly valuable pyridinyl-containing diarylmethanols, including bioactive motif-based analogues, is reported. This method enables arylation of the C(sp3)–H bonds adjacent to an oxygen atom through alkoxy radical formation by O–N bond cleavage, 1,2-hydrogen atom transfer (HAT), arylation
Palladium-Catalyzed Tandem Diolefination Reaction of Benzaldehyde Enabled by a Remote Directing Group
作者:Yangyang Wang、Xian Liu、Xiaobo Xu、Liqiang Hao、Yafei Ji
DOI:10.1021/acs.orglett.3c01507
日期:2023.7.14
A tandem diolefination reaction of benzaldehyde has been developed via Pd-catalyzed β-C(sp2)–H olefination of the benzene ring and tandem C(sp2)–H olefination of acrylate. 2-((Aminooxy)methyl)benzonitrile was involved with the benzaldehyde substrate as a remote directing group to realize the C–H bond activation. The control experiments proved that the presence of a remote cyano group is essential for
Design, synthesis and antifungal activities of novel pyrrole alkaloid analogs
作者:Ming-Zhong Wang、Han Xu、Tuan-Wei Liu、Qi Feng、Shu-Jing Yu、Su-Hua Wang、Zheng-Ming Li
DOI:10.1016/j.ejmech.2011.01.031
日期:2011.5
A series of novel analogs of pyrrole alkaloid were designed and synthesized by a facile method and their structures were characterized by H-1 NMR, C-13 NMR and high-resolution mass spectrometry (HRMS). The structure of compound 2a was identified by 2D NMR including heteronuclear multiple-quantum coherence (HMQC), heteronuclear multiple-bond correlation (HMBC) and H-H correlation spectrometry (H-H COSY) spectra. Their antifungal activities against five fungi were evaluated, and the results indicated that some of the title compounds showed moderate fungicidal activities in vitro against Alternaria solani, Cercospora arachidicola, Fusarium omysporum, Gibberella zeae and Physalospora piricola at the dosage of 50 mu g mL(-1). Compound 2a and 3a exhibited good activities against P. piricola at low dosage. (C) 2011 Elsevier Masson SAS. All rights reserved.