The reactivity of oxa-nickelacycles 7, generated by the reaction of a branched 1, 3-diene and tethered carbonyl group with a Ni (0) complex, was investigated in detail. It was found that oxa-nickelacycles 7 are relatively stable and that β-hydride elimination from 7 occurred at a high temperature, producing the cyclized dienes 51 and/or 52 in good yields. This Ni (0)- catalyzed cyclization via β-hydride elimination from oxa-nickelacycles tolerated various ...
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