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ADAMANTANYL-SUBSTITUTED PEPPSI-TYPE PALLADIUM(II) N-HETEROCYCLIC CARBENE COMPLEXES: SYNTHESIS AND CATALYTIC APPLICATION FOR CH ACTIVATION OF SUBSTITUTED THIOPHENES

Vladimir A. Glushkov, Mikhail S. Denisov, Aleksey A. Gorbunov, Yurii A. Myalitzin, Maksim V. Dmitriev, Pavel A. Slepukhin
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Abstract


Starting from 1-adamantanyl-3-imidazole, a number of new 1-adamantanyl-3-benzylimidazolium salts and corresponding unsymmetrically substituted Pd(II) PEPPSI-type complexes were prepared, including dichloride, dibromide, and diiodide. Single crystal X-ray crystallography confirmed solid state structures in six cases. The complexes reported in this work displayed moderate activities as precatalysts for CH activation/arylation reaction of substituted thiophenes.

Keywords


N-heterocyclic carbene; palladium(II) complexes; thiophene; arylation; CH activation

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