AbstractGroup I alkoxides are highly active precatalysts in the heterodehydrocoupling of silanes and amines to afford aminosilane products. The broadly soluble and commercially available KOtAmyl was utilized as the benchmark precatalyst for this transformation. Challenging substrates such as anilines were found to readily couple primary, secondary, and tertiary silanes in high conversions (>90 %) after only 2 h at 40 °C. Traditionally challenging silanes such as Ph3SiH were also easily coupled to simple primary and secondary amines under mild conditions, with reactivity that rivals many rare earth and transition‐metal catalysts for this transformation. Preliminary evidence suggests the formation of hypercoordinated intermediates, but radicals were detected under catalytic conditions, indicating a mechanism that is rare for Si−N bond formation.
摘要 I 族烷氧基化合物是硅烷和胺异脱氢偶联生成氨基硅烷产物的高活性前催化剂。具有广泛溶解性且可在市场上买到的 KOtAmyl 被用作这种转化的基准前催化剂。研究发现,苯胺等具有挑战性的底物在 40 °C 下仅需 2 小时就能轻易地与伯硅烷、仲硅烷和叔硅烷发生高转化率(90%)的偶联反应。传统上具有挑战性的硅烷(如 Ph3SiH)也很容易在温和的条件下与简单的伯胺和仲胺偶联,其反应活性可与许多稀土和过渡金属催化剂相媲美。初步证据表明形成了超配位中间体,但在催化条件下检测到了自由基,这表明 Si-N 键的形成机制是罕见的。