Wulf Christoph, Doering Ulrike, Werner Thomas
Leibniz-Institut für Katalyse e. V. an der Universität Rostock Albert-Einstein-Str. 29a 18059 Rostock Germany
RSC Adv. 2018 Jan 18;8(7):3673-3679. doi: 10.1039/c7ra12535f. eCollection 2018 Jan 16.
Herein we report the copolymerization of CHO with CO in the presence of various zinc compounds RZn (R = Et, Bu, Pr, Cy and Ph). Several zinc organyls proved to be efficient catalysts for this reaction in the absence of water and co-catalyst. Notably, readily available BuZn reached a TON up to 269 and an initial TOF up to 91 h. The effect of various parameters on the reaction outcome has been investigated. Poly(ether)carbonates with molecular weights up to 79.3 kg mol and a CO content of up to 97% were obtained. Under standard reaction conditions (100 °C, 2.0 MPa, 16 h) the influence of commonly employed co-catalysts such as PPNCl and TBAB has been investigated in the presence of EtZn (0.5 mol%). The reaction of other epoxides ( propylene and styrene oxide) under these conditions led to no significant conversion or to the formation of the respective cyclic carbonate as the main product.
在此，我们报道了在各种锌化合物RZn（R = 乙基、丁基、丙基、环己基和苯基）存在下，环氧化合物（CHO）与一氧化碳（CO）的共聚反应。在无水和无共催化剂的情况下，几种有机锌化合物被证明是该反应的有效催化剂。值得注意的是，容易获得的丁基锌的TON高达269，初始TOF高达91 h-1。研究了各种参数对反应结果的影响。得到了分子量高达79.3 kg/mol且CO含量高达97%的聚（醚）碳酸酯。在标准反应条件（100°C、2.0 MPa、16 h）下，研究了在乙基锌（0.5 mol%）存在下常用共催化剂如PPNCl和TBAB的影响。在这些条件下，其他环氧化合物（环氧丙烷和环氧苯乙烯）的反应没有导致显著的转化，或者以相应的环状碳酸酯作为主要产物生成。
