Iridium(III)-vinylidene chemistry: Conversion of an iridacyclopentadiene-chlorido complex and terminal alkynes to iridacyclopentadiene-vinyl complexes |
| |
Authors: | Joseph M O’Connor Anna G Wenzel Kristin Hiibner |
| |
Institution: | a Department of Chemistry and Biochemistry (0358), University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0358, USA b Joint Science Department, Claremont McKenna, Pitzer and Scripps Colleges, Claremont, CA 91711, USA |
| |
Abstract: | The reactions of κ2(C1,C4)-CR CRCR CR](PPh3)2Ir(Cl) (9, R = CO2Me) with propargyl alcohol derivatives (2-propyn-1-ol, 2-methyl-3-butyn-2-ol, 1-ethynylcyclopentanol, and 1-ethynylcyclooctanol), in the presence of water leads to the formation of iridium(III)-vinyl complexes bearing the general structure κ2(C1,C4)-CR CRCR CR](PPh3)2Ir(CO)(κ1-vinyl) where vinyl = -CH CH2, -(E)-CH CHMe, -CH C(CH2)4, or -CH C(CH2)7. In these, the CO ligand was derived from the terminal carbon of the starting alkyne and the oxygen atom from water. Under anhydrous conditions, 9 undergoes reaction with 2-propyn-1-ol to give trimethyl 1,3-dihydro-3-oxo-4,5,6-isobenzofurantricarboxylate, the result of a cycloaromatization/transesterification involving the buta-1,3-dien-1,4-diyl ligand in 9 and 2-propyn-1-ol. |
| |
Keywords: | Iridium(III)-vinylidene Metallacyclopentadiene Iridium-vinyl complexes Iridacyclopentadiene Iridium complexes Propargyl alcohol 2-Propyn-1-ol Oxygen-18 labeling Cycloaromatization Trimethyl 1 3-dihydro-3-oxo-4 5 6-isobenzofurantricarboxylate Allenylidene ligand Allenylidene complex Enolallenyl ligand Allenol Metallacycle |
本文献已被 ScienceDirect 等数据库收录! |
|