Catalytic Carbon Dioxide Fixation via Carbene Species

研究了在过渡金属催化剂存在下，二氧化碳与二硅烷反应制备金属类碳化合物。我们首先研究了过渡金属催化剂对二硅烷硅键的裂解作用。经过对金属催化剂的广泛筛选，我们发现钯、铂和铜催化剂适合于硅硅键的裂解。对于与二氧化碳的反应，进一步研究了几种配体的催化剂体系，表明nhc配合物对金属类碳化合物的形成具有较高的反应活性。事实上，类羰基化合物与苯乙烯的反应产生了以二氧化碳为C1单元的产物。

Preparation of a metal carbenoid by the reaction of carbon dioxide with disilane in the presence of transition metal catalyst has been investigated. We first investigated the cleavage of the silicon–silicon bond of disilane by transition metal catalysts. After extensive screening of metal catalysts, we found that Pd, Pt, and Cu catalysts were suitable for the silicon–silicon bond cleavage. For the reaction with carbon dioxide, further investigation of catalyst system using several ligands demonstrated that NHC-complex showed high reactivity toward the metal carbenoid formation. Indeed, the reaction of the carbenoid with styrene afforded the product that included carbon dioxide as a C1 unit.