Sl. Buchwald et al., ZIRCONOCENE COMPLEXES OF IMINES - GENERAL-SYNTHESIS, STRUCTURE, REACTIVITY, AND IN-SITU GENERATION TO PREPARE GEOMETRICALLY PURE ALLYLIC AMINES (VOL 111, PG 4486, 1989), Journal of the American Chemical Society, 115(19), 1993, pp. 8885-8885