Stoichiometric reactions and catalytic dehydrogenations of amine–boranes with calcium aryloxide
作者:Xizhou Zheng、Jiasu Huang、Yingming Yao、Xin Xu
DOI:10.1039/c9cc04698d
日期:——
main-group metal calcium conventionally relies on σ-bond metathesis to initiate the reactions. Here, we report a calcium aryloxide based on the tridentate β-diketiminato ligand, which shows transition-metal-like reactivity with dialkylamine–boranes H3B·NHR2 (R = CH3, Cy, C6H5CH2, and iPr) to afford unprecedented amine–borane coordinated complexes through Ca⋯H interactions. This calcium aryloxide was also
通常,使用主族金属钙的催化依赖于σ键复分解来引发反应。在这里,我们报告了基于三齿β-二酮基氨基配体的芳基氧化钙,它显示出与二烷基胺-硼烷H 3 B·NHR 2(R = CH 3,Cy,C 6 H 5 CH 2和i Pr)通过Ca⋯H相互作用提供了前所未有的胺-硼烷配位络合物。该芳基氧化钙也是胺-硼烷脱氢的活性催化剂,并得到氨基硼烷H 2 B NR 2,作为唯一产品。起始物种是钙胺-硼烷钙络合物,而不是通过σ键复分解形成的传统钙氨基硼烷钙络合物。