ABSTRACT The development of efficient strategies for constructing cyclic organosilicon frameworks is considered of great importance because of their structural diversity and synthetic utility. Herein, we report a SmI 2 /Sm‐mediated silacyclization of unsaturated organic compounds with readily available dichlorosilanes and ‐disilanes, enabling convenient access to 4−7‐membered silacyclic compounds. Mechanistic investigations indicate that the reaction involves silyl radical intermediates and proceeds via a reductive radical‐polar crossover (RRPCO) pathway. The present findings showcase the broad potential of Sm reagents in Si─C bond formation, providing a versatile strategy for constructing diverse silicon‐containing frameworks.
Chen et al. (Fri,) studied this question.