

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

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
Latvian Institute of Organic Synthesis - Aizkraukles iela, 21, Riga, LV-1006, Latvia - hgs@osi.lv