1.3- Cycloheptadiene ruthenium complex

QHt, Benzene chromium complex, 21 1, 2 ruthenium complex, 22 177 CftHs, 1,3-Cyclohexadiene ruthenium complex, 21 77 22 177 C7H,0, 1,3-Cycloheptadiene ruthenium complex, 22 179 C,Hs, Benzene, ethynyl- ruthenium complex, 21 82 C H, Benzene, vinyl- ruthenium complex, 21 80... 

The complex functions as the most suitable source of the tricarbonylruthe-nium unit in syntheses of tricarbonyl(7-diene)ruthenium complexes. Derivatives of 1,3-cyclohexadiene, 1,3-cycloheptadiene, cycloheptatriene, cyclooc-tatetraene, 2,4,6-cycloheptatrien-l-one, bicyclo[3.2. l]octa-2,6-diene, bicyclo-[3.2. l]octa-2,4-diene, and butadiene have been prepared by displacement of 1,5-cyclooctadiene. 

Cross-metathesis of terminal alkyne 142 and cyclopentene gives cyclic compound 143 having a diene moiety [Eq. (6.114)]. ° Terminal ruthenium carbene generated from an alkyne and methylidene ruthenium carbene complex reacts with cyclopentene to afford two-carbon elongated cycloheptadiene 143 ... 

CM of propynyl benzoate and cyclopentene in excess was carried out by the same group (Equation (15)). Ring opening of cyclopentene with ruthenium carbene complex Ig followed by intramolecular RCM takes place to give cycloheptadiene in good yield." ... 

Organoruthenium compounds tend to form complexes coordinated by the 10 electrons of cyclic unsaturated compounds similar to ferrocene in organoiron compounds, for example, ruthenocene (r/ -C5H5)2Ru and tf( / -C6Hx)Ru. As shown in Scheme 16.1, ruthenium chloride 3H20 reacts with unsaturated cyclic compounds in the presence of zinc metal to afford cyclic compounds coordinated by 10 electrons by dehydrogenation [15-18]. In the case of cyclopentadiene, ruthenocene is formed by the coordination of two five-electron rings. In the case of 1,3-cyclohexadiene, the complex is obtained to be coordinated with 4-electron 1,3-cyclohexadiene and with 6-electron benzene. In the case of 1,3-cycloheptadiene... 

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