Novel Classes of Alkynyliodonium Salts and Their Applications: The Synthesis of Substituted 1,3-Diynyliodonium Triflates, R - C≡C - C≡C - I???? - Ph<sup>-</sup>OTf, and Their Reaction with Triphenylphosphine
作者:Peter J. Stang、Jörg Ullmann
DOI:10.1055/s-1991-26681
日期:——
Reaction of butadiynyltrialkyltins 1 with cyano(phenyl)iodonium triflates 2 yields 1,3-diynyl(phenyl)iodonium triflates 3, a hitherto unknown class of functionalized diacetylenes. Additionally, the reaction of 3 with triphenylphosphine is described.
2-C≡CSnnBu3-substituted complex 12. Coupling of 12 with C6H4I2-p yields the 2-C≡CC6H4I-p-substituted complex 13. Coupling of 7 with C6H4I2-p yields a mixture of the mono-coupling product 14 and the tetranuclear C≡C–C6H4–C≡C-bridged bis(cyclobutenylidene) complex 15. Coupling of 7 with trans-[(Et3P)2MCl2] in the presence of CuI/[Pd(PPh3)4] gives the trinuclear 2-C≡C–M(PEt3)2X-substituted complexes 16 (M