摘要
A series of copper(I) compounds manifesting with the pyrazole mediated precursor, ArN[CH 2 (C 3 H 3 N 2 )] 2 (Ar = 2,6-diisopropylphenyl) (LN3), were synthesized conveniently and treatment of the derivatives with small organic molecules like pyrazine and triphenylphosphine were analyzed. Reacting one and two equivalents of LN3 with [Cu(CH 3 CN) 4 ]PF 6 in CH 3 CN at room temperature afforded [Cu(LN3)(CH 3 CN) 2 ]PF 6 (1) and [Cu(LN3) 2 ]PF 6 (2), respectively in high yield. Similarly, while reacting one equivalent of LN3 and CuI in acetonitrile for 12 h, produced a white solid, [Cu(LN3)]I (3). Furthermore, by adding one or two equivalents of PPh 3 into compound 1, using methylene chloride as solvent rendered [Cu(LN3)(PPh 3 )]PF 6 (4) and [Cu(LN3)(PPh 3 ) 2 ]PF 6 (5), respectively, in satisfactory yield. In addition, compound {[Cu(LN3)(C 4 H 4 N 2 )] 2 (PF 6 ) 2 } n (6) was generated as one-dimensional polymer by treating compound 1 and pyrazine in THF at room temperature. All the Cu(I)-derivatives were characterized by 1 H and 13 C NMR spectroscopy and the molecular structures (1, 4, and 6) were determined by single crystal X-ray diffraction. Additionally, the catalytic reactions of Sonogashira type C-C coupling were discussed using compounds 2, 3, 5, and 6 as catalysts.