Abstract
Intramolecular co-cyclisation of 4- or 5-azanona-1,8-dienes, -enynes and -diynes using zirconocene(1-butene) gives zirconacycles which may be protonated to afford 3,4- or 4,5-disubstituted azepanes or, for the diyne derived systems, reacted with dimethyl acetylenedicarboxylate and CuCl to afford 2- or 3-benzazepanes.
Key words
zirconium - azepanes - benzazepanes - heterocycles - metallacycles
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