Issue 62, 2019
From the journal:

Chemical Communications

Stoichiometric reactions and catalytic dehydrogenations of amine–boranes with calcium aryloxide†

Xizhou Zheng,a   Jiasu Huang,a   Yingming Yao ORCID logo *a  and  Xin Xu ORCID logo *a  

* Corresponding authors

a Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
E-mail: yaoym@suda.edu.cn, xinxu@suda.edu.cn

Abstract

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[double bond, length as m-dash]NR2, as the sole product. The initiating species was a calcium amine–borane complex rather than the traditional calcium amidoborane complex formed by σ-bond metathesis.

Graphical abstract: Stoichiometric reactions and catalytic dehydrogenations of amine–boranes with calcium aryloxide

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Article information

DOI
https://doi.org/10.1039/C9CC04698D
Article type
Communication
Submitted
19 Jun 2019
Accepted
08 Jul 2019
First published
09 Jul 2019

Chem. Commun., 2019,55, 9152-9155

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Stoichiometric reactions and catalytic dehydrogenations of amine–boranes with calcium aryloxide

X. Zheng, J. Huang, Y. Yao and X. Xu, Chem. Commun., 2019, 55, 9152 DOI: 10.1039/C9CC04698D

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