Regioselectivity in C-H activation: Reactions of N-heterocyclic indenes with Ru-3(CO)(12)

摘要

Thermal treatment of Ru-3(CO)(12) with 3-(6-ethyl-2-pyridyl)indene in refluxing toluene gave a triruthenium carbonyl complex {mu(2)-eta(5):eta(1)-(C2H5C5H4N)(C9H5))Ru-3(CO)(9) (1) via regioselective C(sp(2))-H activation. While reaction of 2-methyl-3-(6-ethyl-2-pyridyl)indene with Ru-3(CO)(12) generated a dinuclear ruthenium complex {(C2H5C5H4N)(mu(2)-eta(5),eta(1)-C9H5CH2))Ru-2(CO)(5) (2) via regioselective C(sp(3))-H bond activation. When the pyridyl rings were replaced by more bulky quinolinyl rings, only eta(5)-indenyl ruthenium complexes were produced. The molecular structure of 2 was determined by X-ray diffraction analysis. (C) 2018 Elsevier Ltd. All rights reserved.