1: nBuLi, TMEDA / diethyl ether; hexane 2: CrO3 / diethyl ether; H2O View Scheme

pentacarbonyl(η2-cis-cyclooctene)chromium(0) in dichloromethane 16 h; Ambient temperature;

1: nBuLi, TMEDA / diethyl ether; hexane 2: CrO3 / diethyl ether; H2O View Scheme

sodium tetrahydroborate; boron trifluoride diethyl etherate 1.) benzene, 25 deg C, 2 h, 2.) benzene, ethanol, from 0 deg C to 25 deg C, 3 h; Yield given. Multistep reaction. Yields of byproduct given;

pentacarbonyl(η2-cis-cyclooctene)chromium(0) in dichloromethane 16 h; Ambient temperature;