Unexpected Reaction of (trindane)Mn(CO)<sub>3</sub><sup>+</sup>BF<sub>4</sub><sup>-</sup> with Potassium <i>tert</i>-Butoxide: Three C−H Insertions and a Haptotropic Shift
作者:Nada Reginato、Michael J. McGlinchey
DOI:10.1021/om010722e
日期:2001.10.1
(eta (6)-trindane)Mn(CO)(3)+BF4- (1) reacts with (BuOK)-O-t in THF in the presence of alkyl halides (CH3I, CH2 = CHCH2Br, CH2Cl2) to yield the corresponding (eta (6)-C15H18)Mn(CO)(2)X, where X = I, Br, Cl. In contrast, 1 and ButOK react, in the presence of a donor ligand, to generate (eta (5)-C15H15)Mn(CO)(2)L, where L = CO, P(OMe)(3), PPh3, in which the metal has migrated from the central ring onto a peripheral ring that has lost three hydrogens; (eta (6)-indane)Mn(CO)(3)+BF4- behaves similarly. A mechanism is proposed in which the initially formed (eta (6)-trindane)Mn(CO)(2)CO2But suffers loss of CO2 and isobutene to yield the hydride (eta (6)-trindane)Mn(CO)(2)H, which in turn undergoes three successive C-H insertions with concomitant loss of 2 mol of dihydrogen.