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The selection of rhodium precatalyst and phosphine ligand determines the course of the cycloisomerization of N-allylated bicyclo[1.1.0]butylalkylamines. Cyclopropane-fused pyrrolidines and azepines are obtained with high levels of stereo- and regiocontrol. Novel azatricyclo[6.1.0.0(1,5)]nonanes are the result of a tandem cycloisomerization-ring closing metathesis sequence. Allylic ethers lead to furans and oxepanes.
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Walczak et al. (2008) studied this question.
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