REACTION OF TITANOCENE ALKYLS WITH PYRIDINES; A NOVEL TYPE OF CYCLOMETALLATION REACTION

Article abstract of DOI:10.1016/S0022-328X(00)85956-2

Reaction of Cp2TiR (R = alkyl) with 2-substituted-pyridines and with quinolines leads to α-metallation of these ligands with formation of triangular titanocycles containing Ti^III.Proof of the metallation at the α-position comes from reactions of the complexes formed with I2 and D2O/DCl which yield the corresponding iodo- and deutero-pyridine and -quinoline derivatives.Reaction of Cp2TiR with the structurally related ligand benzalaniline leads to a side-on coordinated benzalaniline complex of titanocene.Reactions of this diamagnetic complex with I2, CO2 and H2 aredescribed.