Chromium-Templated Benzannulation of (η<sup>5</sup>-Cyclohexadienyl)Mn(CO)<sub>3</sub>-Methoxy-Cr(CO)<sub>5</sub> Carbenes
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Pentacarbonyl{methoxy-[1-(η5-4-methoxy-6-phenylcyclohexadienyl)tricarbonylmanganese]carbene}chromium (5) accessible from (η5-1-bromo-4-methoxy-6-phenylcyclohexadienyl)tricarbonylmanganese (4) and Cr(CO)6 undergoes a chromium-templated benzannulation with 3-hexyne to give monometallic Cr complex 12 in 60% yield. The key feature of this reaction is the participation of a conjugated double bond of the η5-cyclohexadienyl-Mn moiety in the [3+2+1] benzannulation reaction. The X-ray structure of complex 12 reveals a syn position of the phenyl group with respect to the Cr tripod, supporting the participation of the Mn moiety in the benzannulation process.
创建时间:
2016-02-22



