Nickel-Catalyzed Tetramerization of Alkynes: Synthesis and Structure of Octatetraenes
作者:Tsun-Cheng Wu、Jheng-Jhih Chen、Yao-Ting Wu
DOI:10.1021/ol201814q
日期:2011.9.16
In the presence of a catalytic system comprised of NiBr2(dppe) and Zn, arylacetylenes undergo tetramerization to form linear octatetraenes, generally in good to excellent yields. The structure of the coupling products was verified by X-ray crystallography.
One order of magnitude: Naphthalene‐ and acenaphthene‐fused phosphole P‐oxides (see figure) are shown to have reasonably high thermal and electrochemical stabilities and electron‐accepting ability. The electron mobility of the naphthalene‐fused phosphole P‐oxide is about one order higher than that of tris(8‐hydroxyquinoline)aluminium(III) Alq3 at any given electric field.
unfunctionalized arenes with 1,6-diynes, possessing aryl groups at the diyne termini, proceeds to give the corresponding dienylated arenes in the presence of a catalytic amount of an electron-deficient cyclopentadienyl rhodium(III) complex, [CpERhCl2]2, and a stoichiometric amount of silver carbonate. Experimental and theoretical mechanisticstudies revealed that a CpERh(I) complex generated in situ