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High-Loading Single-Atom Copper Catalyst Supported on Coordinatively Unsaturated Al2 O3 for Selective Synthesis of Homoallylboronates.
ChemSusChem ( IF 7.5 ) Pub Date : 2020-03-25 , DOI: 10.1002/cssc.202000536 Tenglong Guo 1 , Nanfang Tang 1 , Feng Lin 1, 2 , Qinghao Shang 1, 3 , Shuai Chen 1 , Haifeng Qi 1, 3 , Xiaoli Pan 1 , Chuntian Wu 1 , Guoliang Xu 1 , Jian Zhang 1 , Dezhu Xu 1 , Yu Cong 1
ChemSusChem ( IF 7.5 ) Pub Date : 2020-03-25 , DOI: 10.1002/cssc.202000536 Tenglong Guo 1 , Nanfang Tang 1 , Feng Lin 1, 2 , Qinghao Shang 1, 3 , Shuai Chen 1 , Haifeng Qi 1, 3 , Xiaoli Pan 1 , Chuntian Wu 1 , Guoliang Xu 1 , Jian Zhang 1 , Dezhu Xu 1 , Yu Cong 1
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Single‐atom catalysts (SACs) as a bridge between hetero‐ and homogeneous catalysis have attracted much attention. However, it is still challenging to generate stable single atoms with high metal loadings, and the application of SACs in traditionally homogeneous catalytic reactions is highly desirable. Herein, a Cu SAC with a high Cu loading of 8.7 wt % supported on coordinatively unsaturated Al2O3 was prepared and used in the amine‐free synthesis of homoallylboranes. Up to 99 % conversion, 95 % 1,4‐selective boration of the enals, and 48–68 % isolated yields of homoallylboranes were achieved, equaling the results of reported homogenous catalysts, and the system was more efficient and stable than nano Cu/γ‐Al2O3. Mechanistic investigation indicated that Cu‐Bpin species are the active intermediates of selective boration. The superior catalytic and recycling performance of Cu SAC paves an efficient and green path toward selective synthesis of homoallyborane fine chemicals.
中文翻译：
负载在配位不饱和Al2 O3上的高负荷单原子铜催化剂用于选择性合成高烯丙基硼酸酯。
作为杂化和均相催化之间桥梁的单原子催化剂（SAC）引起了广泛关注。然而，产生具有高金属负载量的稳定的单原子仍然具有挑战性，并且非常需要在传统的均相催化反应中使用SAC。在此，制备了负载在配位不饱和Al 2 O 3上的担载量为8.7 wt％的高Cu含量的Cu SAC，并将其用于无胺合成高烯丙烷。达到了高达99％的转化率，95％的1,4-选择硼酸烯丙基化和48-68％的均烯丙基异丁烯分离产率，与报道的均相催化剂的结果相当，而且该系统比纳米Cu /更高效，更稳定。 γ‐Al 2 O 3。机理研究表明，Cu-Bpin物种是选择性硼酸化的活性中间体。Cu SAC优异的催化和再循环性能为选择合成高烯丙基硼烷精细化学品铺平了一条高效而绿色的道路。
更新日期：2020-03-25
中文翻译：
负载在配位不饱和Al2 O3上的高负荷单原子铜催化剂用于选择性合成高烯丙基硼酸酯。
作为杂化和均相催化之间桥梁的单原子催化剂（SAC）引起了广泛关注。然而，产生具有高金属负载量的稳定的单原子仍然具有挑战性，并且非常需要在传统的均相催化反应中使用SAC。在此，制备了负载在配位不饱和Al 2 O 3上的担载量为8.7 wt％的高Cu含量的Cu SAC，并将其用于无胺合成高烯丙烷。达到了高达99％的转化率，95％的1,4-选择硼酸烯丙基化和48-68％的均烯丙基异丁烯分离产率，与报道的均相催化剂的结果相当，而且该系统比纳米Cu /更高效，更稳定。 γ‐Al 2 O 3。机理研究表明，Cu-Bpin物种是选择性硼酸化的活性中间体。Cu SAC优异的催化和再循环性能为选择合成高烯丙基硼烷精细化学品铺平了一条高效而绿色的道路。
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