Reaction of acetylenic hydrocarbons with α,β-unsaturated ketones in tetrahydrofuran in the presence of lithium naphthalene
作者:Kyoichi Suga、Shoji Watanabe、Toshimitsu Suzuki
DOI:10.1139/v68-504
日期:1968.10.1
Lithium naphthalene reacts easily with terminal acetylenic hydrocarbons, such as acetylene, methyl-acetylene, or phenylacetylene, to give the corresponding lithium compounds quantitatively. The rea...
萘锂容易与乙炔、甲基乙炔或苯乙炔等末端炔烃反应,定量生成相应的锂化合物。实际...
Facile coupling of propargylic, allylic and benzylic alcohols with allylsilane and alkynylsilane, and their deoxygenation with Et3SiH, catalyzed by Bi(OTf)3 in [BMIM][BF4] ionic liquid (IL), with recycling and reuse of the IL
作者:G. G. K. S. Narayana Kumar、Kenneth K. Laali
DOI:10.1039/c2ob26046h
日期:——
substituted propargylicalcohol 1e with allyl-TMS gave the skeletally intact 1,5-enyne and a ring opened derivative as a mixture. Coupling of propargylic/allylic alcohol 1f with allyl-TMS resulted in allylation at both benzylic (2 isomers) and propargylic positions, as major and minor products respectively. The scope of this methodology for allylation of a series of allylic and benzylic alcohols was explored
Ruthenium-Catalyzed Functionalization of Pyrroles and Indoles with Propargyl Alcohols
作者:Nora Thies、Cristian G. Hrib、Edgar Haak
DOI:10.1002/chem.201200188
日期:2012.5.14
Several ruthenium‐catalyzed atom‐economic transformations of propargylalcohols with pyrroles or indoles leading to alkylated, propargylated, or annulated heteroaromatics are reported. The mechanistically distinct reactions are catalyzed by a single ruthenium(0) complex containing a redox‐coupled dienone ligand. The mode of activation regarding the propargylalcohols determines the reaction pathway
Convenient Synthesis of Polysubstituted 3-Iodofurans through the Tandem Ring-Opening/Cyclization Reaction of 1-Alkynyl-2,3-epoxy Alcohols
作者:Yong-min Liang、Shu-guang Wen、Wei-min Liu
DOI:10.1055/s-2007-990830
日期:2007.11
A novel method for the synthesis of highlysubstituted iodine-containing furans has been developed by the cyclization of 1-(aryl ethynyl)-2,3 -epoxy alcohols (1-aryl-4,5-epoxyalk-1-yn-3-ols) with alcohols as nucleophiles under very mild reaction conditions. The resulting iodine-containing furans can be readily elaborated to more complex products using known organopalladium chemistry.
An efficient acid-catalyzed propargylation/aza-annulation sequence was developed under metal-free reaction conditions, thus leading to a one-potsynthesis of a variety of substituted β-carbolines starting from propargylic alcohols and indole 2-carbonyls. This versatile strategy was further extended to the synthesis of 5-azaindoles and 5-azabenzothiazoles. Optical properties suggested that manipulation