Iron-Catalyzed <i>gem</i>
-Specific Dimerization of Terminal Alkynes
作者:Qiuming Liang、Kimberly M. Osten、Datong Song
DOI:10.1002/anie.201700904
日期:2017.5.22
We report a gem-specific homo- and cross-dimerization of terminalalkynes catalyzed by a well-defined iron(II) complex containing Cp* and picolyl N-heterocyclic carbene (NHC) ligands, and featuring a piano-stool structure. This catalytic system requires no additives and is compatible with a broad range of substrates, including those with polar functional groups such as NH and OH.
Phosphinito palladium(<scp>ii</scp>) complexes as catalysts for the synthesis of 1,3-enynes, aromatic alkynes and ynones
作者:R. E. Islas、J. Cárdenas、R. Gaviño、E. García-Ríos、L. Lomas-Romero、J. A. Morales-Serna
DOI:10.1039/c6ra28855c
日期:——
catalyst in the formation of C–C bonds. The coupling of terminalalkynes formed gem-1,3-enynes as the only reaction products. Aromatic alkynes can be synthesized from the coupling of terminalalkynes and haloaromatic compounds (Sonogashira coupling). The phosphinito palladium(II) complex also catalyses the coupling between acyl chlorides and terminalalkynes (Sonogashira coupling), furnishing ynones in excellent
Regio- and Stereoselective Dimerization of Terminal Alkynes to Enynes in InCl<sub>3</sub>-NaBH<sub>4</sub>-MeCN System
作者:De-Yu Yang、Chun-Yan Wang、Hua Su
DOI:10.1055/s-2004-815428
日期:——
A novel method to prepare (E)-enynes is described in this paper. The InCl3-NaBH4-MeCN system showed high regio- and stereoselectivity for the dimerization of terminal alkynes to enynes.
Vinyl halides can be coupled by NiCRA-bpy in THF or hexane. Interestingly simply changing the solvent changes the nature of the product : diene in THF, and enyne in hexane.