Construction of Octaalkyl-Substituted and Decasubstituted all-cis-Octatetraenes via Linear Dimerization of 1,4-Dicopper-1,3-butadienes and Subsequent Cross-Coupling with Halides
摘要:
Lithium iodide-assisted linear dimerization of 1,4-dicopper-1,3-butadienes and subsequent Pd-catalyzed cross-coupling reaction with halides provide an efficient way to construct octaalkyl-substituted and decasubstituted all-cis octatetraenes.
Reactions of Substituted (1,3-Butadiene-1,4-diyl)magnesium, 1,4-Bis(bromomagnesio)butadienes and 1,4-Dilithiobutadienes with Ketones, Aldehydes and PhNO To Yield Cyclopentadiene Derivatives and N-Ph Pyrroles by Cyclodialkenylation
作者:Hongyun Fang、Guotao Li、Guoliang Mao、Zhenfeng Xi
DOI:10.1002/chem.200400025
日期:2004.7.19
4-Dilithiobutadiene derivatives 1, 1,4-bis(bromomagnesio)butadienederivatives 2 and metallacyclic (1,3-butadiene-1,4-diyl)magnesium reagents 3 were prepared and their reactions with ketones, aldehydes, and PhNO were investigated. Multiply substitutedcyclopentadienes and N-Phpyrroles were formed by unprecedented reaction conditions. The carbonyl group of aldehydes and ketones was deoxygenated during
CuCl-mediated tandem CO insertion and annulation of 1,4-dilithio-1,3-dienes: formation of multiply substituted cyclopentadienones and/or their head-to-head dimers
作者:Qian Luo、Chao Wang、Wen-Xiong Zhang、Zhenfeng Xi
DOI:10.1039/b719007g
日期:——
Mediated by CuCl, 1,4-dilithio-1,3-dienes reacted with carbon monoxide (CO) to generate multi-substituted cyclopentadienones and/or their head-to-head dimers, via tandem CO insertion and intra/intermolecular cycloaddition of organocopper compounds.
在氯化铜的介导下,1,4-二硫-1,3-二烯与一氧化碳(CO)反应,通过串联 CO 插入和有机铜化合物的分子内/分子间环加成,生成多取代环戊二烯酮和/或其头对头二聚体。
Novel reaction patterns of carbon disulfide with organolithium compounds via cleavage of CS bonds or via cycloaddition reactions
作者:Jinglong Chen、Qiuling Song、Zhenfeng Xi
DOI:10.1016/s0040-4039(02)00581-6
日期:2002.5
Carbon disulfide reacted at room temperature with 1,4-dilithio-1,3-diene species via cleavage of the CS double bonds affording multiply substituted thiophenes or via cycloaddition reactions affording thiopyran-2-thiones.
prepared from diiodobutadienes reacted with diiodobenzene or diiodonaphthalene to afford substituted naphthalene, anthracene, dihydronaphthacene, and dihydropentacene derivatives in the presence of CuCl and DMPU. Dihydronaphthacene and dihydropentacene derivatives were converted into the corresponding naphthacene and pentacene derivatives.
Dialkenylation of Carbonyl Groups by Alkenyllithium Compounds: Formation of Cyclopentadiene Derivatives by the Reaction of 1,4-Dilithio-1,3-dienes with Ketones and Aldehydes
作者:Zhenfeng Xi、Qiuling Song、Jinglong Chen、Hairong Guan、Pixu Li