Convergent synthesis of pyrrolidines, piperidines, perhydroazepines and tetrahydroisoquinolines via zirconocene η2-imine complexes
作者:Michael C.J. Harris、Richard J. Whitby、Julian Blagg
DOI:10.1016/0040-4039(95)00741-t
日期:1995.6
Zirconoceneη2-iminecomplexes formed by a CH activation route from a variety of amines are trapped by ω-halo-alkenes or -alkynes to afford 2,3-disubstituited pyrrolidines, piperidines and perhydroazepines on work up and cyclisation. In some cases it was necessary to use a protected hydroxyl group rather than the halide and cyclise in a separate step through selective formation of the O-mesylate.