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A novel approach to the direct construction of tricyclic nitrogen heterocycles based on gold‐catalyzed cascade cyclization of aminoallenynes is described. The expected biscyclization reaction of hydroxyisobutyryl‐protected aminoallenynes was efficiently promoted by a catalytic amount of BrettPhosAuNTf2 in the presence of iPrOH to produce 1,2‐dihydrobenzo[cd]indole derivatives in good yields. When...
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