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Visible‐light photoredox‐catalyzed carboxylation of benzyl halides with CO_(2):Mild and transition‐metal‐free

Chinese Journal of Catalysis 2022年第7期43卷 1667-1673页

作者： Ke Jing Ming‐Kai Wei Si‐Shun Yan Li‐Li Liao Ya‐Nan Niu Shu‐Ping Luo Bo Yu Da‐Gang Yu Key Laboratory of Green Chemistry&Technology of Ministry of Education College of ChemistrySichuan UniversityChengdu 610064SichuanChina State Key Laboratory Breeding Base of Green Chemistry‐Synthesis Technology Zhejiang University of TechnologyHangzhou 310014ZhejiangChina

The visible‐light photoredox‐catalyzed carboxylation of benzyl chlorides and bromides with CO_(2) has been *** inexpensive organic dyes as photocatalysts and amines as electron donors,this carboxylation proceeds well in the absence of sensitive organometallic reagents,transition metal catalysts,or metallic reductants.A wide range of commercially available and inexpensive benzyl halides undergo such carboxylation to give valuable aryl acetic acids,including several pharmaceutical molecules and drug precursors,in moderate to high ***,this reaction features mild reaction conditions(one atmospheric pressure of CO_(2) and room temperature),broad substrate scope,good functional group tolerance,easy scalability,and low catalyst loading,thus providing an efficient approach for the assembly of aryl acetic acids.

关键词： Carbon dioxide Visible‐light photoredox catalysis Carboxylation Aryl acetic acids benzyl halides

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Palladium-catalyzed Cascade Cyclization-Coupling Reaction of benzyl halides with N, N-Diallylbenzoylamide

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Chinese Chemical Letters 2003年第8期14卷 771-772页

作者： Yi Min HU Yu ZHANG Jian Lin HAN Cheng Jian ZHU Yi PAN School of Chemistry and Chemical Engineering Nanjing UniversityNanjing 210093

A novel type of palladium-catalyzed cascade cyclization-coupling reaction has been found. Reaction of N, N-diallylbenzoylamide 1 with benzyl halides 2 afforded the corresponding dihydropyrroles 3 in moderate to excel... 详细信息

关键词： Palladium Heck reaction benzyl halides cyclization cascade reaction.

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One-pot Pd-Catalyzed C=C forming Synthesis of Diphenylethene via reaction of benzaldehyde,tosylhydrazide with benzyl halide

One-pot Pd-Catalyzed C=C forming Synthesis of Diphenylethene...

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中国化学会第十三届全国有机合成化学学术研讨会

作者： Shen Xu Liu Ping School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan Shihezi University

Diphenylethene compounds,also known as stilbenes,have attracted much attention of researchers for their wide applications in chemistry,medicine,electronics,optics and materials science *** example,resveratrol[1]（3,5,4 ′-trihydroxystilbene） can prevent or slow the progression of a wide variety of illnesses,including cancer,cardiovascular disease and ischaemic injuries,as well as enhance stress resistance and extend the lifespans of various organisms from yeast to ***-combretastatin A-4 was found to cause mitotic arrest in murine leukemia cells,inhibit tubulin polymerization,and competitively inhibit the binding of radiolabeled colchicine to tubulin[2].（Figure 1）Here we showed that the Pd-catalyzed reaction of benzaldehyde,tosylhydrazide with benzyl halide is an effective approach for diphenylethene synthesis,the desired alkenes can be obtained in good yield and excellent E-selectivity.

关键词： diphenylethene Pd-catalyzed cross-coupling benzaldehyde benzyl halides

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