Journal
ORGANOMETALLICS
Volume 37, Issue 24, Pages 4576-4584Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.organomet.8b00568
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Funding
- Science and Engineering Research Board, India [SB/S1/IC-10/2014]
- Ramanujan Research Grant [SB/S2/RJN-073/2014]
- CSIR, India
- MSM [CSC0129]
- DST [EMR/2014/000013]
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Ever increasing demand for green and sustainable chemical processes has set up a drive to replace transition metals with earth-abundant, nontoxic, and environmentally benign alternatives. In this regard, the alkaline earth metal complexes have attracted significant attention. Herein, we have used a beta-diketiminato ligand with methyl-pyridine side arm to synthesize magnesium (1) and calcium (2) compounds. The constitutions of 1 and 2 have been confirmed by single crystal X-ray studies, which show that the magnesium and calcium atom in 1 and 2 possesses octahedral geometry. Subsequently, we have used them as catalysts (1 mol %) for hydroboration of a wide range of aldehydes using pinacolborane (HBpin) at room temperature. The strategy has further been extended to ketones with 2 mol % catalyst loading. DFT calculations have been performed to understand the mechanism.
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