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Insert alkyne to continue: Reaction of a bis(ureate) zirconium dimethylamido complex with electron‐rich alkynes leads to vinylamine insertion products (see scheme). The insertion of CC unsaturated bonds into MN bonds is proposed as a key step in lanthanide chemistry and, more recently, hydroamination reactions catalyzed by Group 4 metals. For the first time, these elusive intermediates have been...
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