Electrophilic additions to alkynyl tosylates. Formation of vinyl 1,1-(bis esters) and related compounds. X-ray structure determination of (E)-1-chloro-1-(tosyloxy)-3,3-dimethyl-1-butene
Synthesis, Structure, and Reaction of 1-Alkynyl(aryl)-λ<sup>3</sup>-bromanes
作者:Masahito Ochiai、Yoshio Nishi、Satoru Goto、Motoo Shiro、Hermann J. Frohn
DOI:10.1021/ja038777q
日期:2003.12.1
Reported here for the first time are the synthesis, structure, and reaction of hypervalent 1-alkynyl(aryl)-λ3-bromanes. BF3-catalyzed ligand exchange on bromine(III) of p-trifluoromethylphenyl(difluoro)-λ3-bromane with 1-alkynyl(trimethyl)stannanes in dichloromethane at −78 °C afforded 1-alkynyl(aryl)-λ3-bromanes in good yields. Trimethyl(trimethylsilylethynyl)stannane gave silylethynyl-λ3-bromane
这里首次报道了高价 1-炔基(芳基)-λ3-溴烷的合成、结构和反应。在-78 °C 的二氯甲烷中,BF3 催化对三氟甲基苯基(二氟)-λ3-溴与 1-炔基(三甲基)锡烷的溴(III)进行配体交换,以良好的产率得到 1-炔基(芳基)-λ3-溴. 三甲基(三甲基甲硅烷基乙炔基)锡烷选择性地生成甲硅烷基乙炔基-λ3-溴烷。将炔基溴烷的炔碳原子的 13C NMR 化学位移与炔基-λ3-碘烷的化学位移进行比较,并根据自旋轨道诱导的重原子效应进行解释。叔丁基乙炔基溴的结构是通过其冠醚配合物的单晶 X 射线分析确定的。
Acetylenic esters. Preparation and mechanism of formation of alkynyl tosylates and mesylates via tricoordinate iodonium species
作者:Peter J. Stang、Bruce W. Surber、Zhen Chu Chen、Kenneth A. Roberts、Albert G. Anderson
DOI:10.1021/ja00235a034
日期:1987.1
Synthese de tosylates et mesylates d'alcyne-1yle a partir de diacetoxyiodobenzene et d'acides sulfoniques. Structurecristallined'un compose intermediaire (le tosylate de (phenyl phenylethynyl (iodonium)
合成这些 de tosylates 和 mesylates d'alcyne-1yle a partir de diacetoxyiodobenzo et d'acides sulfoniques。结构 cristalline d'un compose intermediaire (le tosylate de (phenyl phenylethynyl (iodonium))
New one-pot method for the synthesis of alkynyl sulfonate esters using ultrasound
作者:Atilla Tuncay、Beth M. Anaclerio、Melissa Zolodz、Kenneth S. Suslick
DOI:10.1016/s0040-4039(98)02503-9
日期:1999.1
A new one-pot method for the preparation of alkynylsulfonateesters from terminal alkynes is reported. A metal-assisted, ultrasound-enhanced nucleophilic acetylenic displacement through the alkynyl(phenyl)iodonium salts provides a direct and rapid access to novel alkynylsulfonates in good yields in a simple one-step procedure.