Stereodivergent Access to Trisubstituted Alkenylboronate Esters through Alkene Isomerization
作者:Lucas Segura、Itai Massad、Masamichi Ogasawara、Ilan Marek
DOI:10.1021/acs.orglett.1c03513
日期:2021.12.3
We report an efficient method for the preparation of synthetically valuable trisubstituted alkenylboronate esters through alkene isomerization of their readily available 1,1-disubstituted regioisomeric counterparts. Either stereoisomer of the target alkenylboronate motif can be obtained at will from the same starting material by employing different isomerization catalysts.
Aromatization of dihydronaphthalenes have been accomplished under mild conditions using an organic photocatalyst. Scope and limitations of the approach have been evaluated along with the reaction mechanism.
Cobalt-Catalyzed Asymmetric Synthesis of gem-Bis(silyl)alkanes by Double Hydrosilylation of Aliphatic Terminal Alkynes
作者:Jun Guo、Hongliang Wang、Shipei Xing、Xin Hong、Zhan Lu
DOI:10.1016/j.chempr.2019.02.001
日期:2019.4
value in asymmetric synthesis, functional materials, and medicinal chemistry. Compared with single-silyl compounds, bis(silyl) ones are understudied because of the lack of the efficient synthetic protocols. The development of efficient synthetic approaches to access bis(silyl) compounds is highly desirable for studying their basic properties and potential utilities. Here, a cobalt-catalyzed sequential
Copper-catalyzed endo-type trifluoromethylarylation of alkynes
作者:Jun Xu、Yun-Long Wang、Tian-Jun Gong、Bin Xiao、Yao Fu
DOI:10.1039/c4cc05692b
日期:——
A new copper-catalyzed trifluoromethylarylation reaction of alkynes has been developed. The transformation represents the first example of endo-type carbotrifluoromethylation of unsaturated carbon-carbon bonds and provides efficientaccess to a variety of CF3-substituted dihydronaphthalenes and chromenes.
Copper-Catalyzed Carboarylation of Alkynes via Vinyl Cations
作者:Andrew J. Walkinshaw、Wenshu Xu、Marcos G. Suero、Matthew J. Gaunt
DOI:10.1021/ja405972h
日期:2013.8.28
Copper-catalyzed arylation of electron rich alkynes reveals stabilized trisubstituted vinylcation equivalents that react with pendant arene nucleophiles to form all carbon tetrasubstituted alkenes. The new process streamlines the synthesis of important medicinally relevant molecules.