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The gold(I)‐mediated domino reaction to fused phosphonium fluorenes has been developed. The key achievement in this study was the elucidation of the reaction mechanism, revealing a phosphinoauration and 6‐endo‐dig cyclization cascade. The cover picture displays the found reaction pathway in an unconventional pool game. In a comfortable atmosphere, the player shoots the golden billiard ball to the...
A domino sequence, involving a phosphinoauration and a gold‐catalyzed 6‐endo‐dig cyclization step, was developed. Starting from modular and simple‐to‐prepare phosphadiynes, π‐extended phosphoniumfluorenes were synthesized. The mechanistic proposal was supported by kinetic measurements and by the trapping of key intermediates. These led to important conclusions for the gold‐catalyzed hydroarylation...
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