Reaction of 2,5-dimethylazaferrocene with see-BuLi/TMEDA in THF at -78 degreesC, followed by quenching with D2O brought about incorporation of deuterium into the Cp ring (54%), methyl groups (38%) and the pyrrolyl ss-position (8%). When benzyl chloride or p-methoxybenzaldehyde was used as quenchers products originated from the lateral lithiation were only formed, accompanied by recovered starting material. For this reaction a radical pathway is suggested. (C) 2004 Elsevier B.V. All rights reserved.
Reaction of 2,5-dimethylazaferrocene with see-BuLi/TMEDA in THF at -78 degreesC, followed by quenching with D2O brought about incorporation of deuterium into the Cp ring (54%), methyl groups (38%) and the pyrrolyl ss-position (8%). When benzyl chloride or p-methoxybenzaldehyde was used as quenchers products originated from the lateral lithiation were only formed, accompanied by recovered starting material. For this reaction a radical pathway is suggested. (C) 2004 Elsevier B.V. All rights reserved.