Stoichiometric reactions and catalytic dehydrogenations of amine–boranes with calcium aryloxide
Xizhou Zheng, Jiasu Huang, Yingming Yao *（姚英明） and Xin Xu *（徐信）
Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China.
Chem. Commun., 2019, 55, 9152--9155
Catalysis with the 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 an active catalyst in dehydrogenation of amine–boranes, and gave aminoboranes H2B