Replacing DCE with MeCN reduced the reaction efficiency (entry 12). Consistent with many Co-H catalytic systems, the addition of a polar, protic solvent, t-BuOH, was crucial for maintaining high catalytic efficiency by generating an alkoxysilane in situ (entry 13). 5l, 8 Intriguingly, water also served as an effective additive, yielding a comparable amount of the desired product (entry 14). An elevated temperature of 90 °C was necessary to facilitate 1,2-radical migration, leading to a more stable radical intermediate (entry 15). Notably, the reaction is insensitive to air and afforded the desired product in comparable yield, demonstrating its robustness and operational simplicity (entries 16).