Palladium-Catalyzed Annulation of Alkynes with Ortho-Halide-Containing Benzyl Alcohols in Aqueous Medium
摘要:
The Pd-catalyzed annulations of ortho-halide-containing benzyl alcohols with alkynes for the synthesis of indenones were achieved in aqueous Triton X-100 micelles with good yields and wide substrate scopes. Moreover, the indenones obtained in this procedure can be further functionalized to form some more synthetic useful derivatives via an environmental-friendly way.
made in transformations of unstrained benzylic (tert-)alcoholsthrough β-aryl elimination, catalytic carbonylation has not yet been developed extensively because alkoxycarbonylation is probably favored over β-aryl elimination. In this letter, we report on the rhodium(I)-catalyzed carbonylative annulation of α,α-dimethyl-(2-bromoaryl)methanols with internal alkynes using furfural leading to the formation
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。
Ni-Catalyzed Larock Indenone Annulation with Aliphatic- and Silyl-Substituted Alkynes Supported by Mechanistic Analysis
作者:Hannah M. Hynds、Holli E. Lemons、Jasmine D. Willis、MarKayla J. Bell、Sydney E. Bottcher、Mei Lin N. Dye、Emily T. Echols、Edward L. Garner、Lauren E. Hutchinson、Caleb M. Phillips、Claudia P. Stephens、Thomas M. Gilbert、Dale J. Wilger
DOI:10.1021/acs.organomet.2c00016
日期:2022.3.28
Efficient Synthesis of Cyclopentadienone Derivatives by the Reaction of Carbon Dioxide with 1,4-Dilithio-1,3-dienes
作者:Zhenfeng Xi、Qiuling Song
DOI:10.1021/jo005641r
日期:2000.12.1
One-pot reaction of carbon dioxide with 1,4-dilithio-1,3-diene derivatives afforded cyclopentadienone derivatives bearing various substituents in high yields within several minutes.
Alkyl-substituted zirconacyclopentadienes reacted with CO directly at room temperature to give cyclopentenone derivatives as a mixture of cis and trans isomers after hydrolysis. Cyclopentadienones were not obtained. In the case of zirconaindene, both of indanones and indenones were obtained after hydrolysis. Treatment of unsymmetrical zirconacyclopentadienes prepared from diphenylacetylene and 4-octyne with CO at room temperature afforded cyclopentenones as a mixture of positional isomers of the double bond. (C) 2003 Elsevier B.V. All rights reserved.