Journal
NEW JOURNAL OF CHEMISTRY
Volume 43, Issue 43, Pages 16812-16818Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9nj04076e
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Funding
- JICA FRIENDSHIP Project under the Collaboration Kick-starter Programme (CKP)
- MHRD
- UGC India
- Osaka University, Japan
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The reaction of diethylzinc with imidazolin-2-imines (Im (R) NH, R = Dipp (2,6-diisopropylphenyl)), Mes (2,4,6-trimethylphenyl), and Bu-t (tert-butyl) afforded the corresponding dimeric zinc(ii) imidazolin-2-iminato complexes [{(Im (R) N)Zn(CH2CH3)}(2)] (R = Dipp, 1a; R = Mes, 1b; R = Bu-t, 1c). The zinc complexes were characterised using spectroscopic techniques and the molecular structure of complex 1b was established by single-crystal X-ray diffraction analysis. Complex 1c was used as a catalyst for the chemo-selective hydroboration of organic nitriles with pinacolborane (HBpin) at ambient temperature to obtain diborylamines of a broad substrate scope in high yield. Zinc complex 1c exhibits a versatile substrate scope and good functional group tolerance for catalytic hydroboration reactions. A most plausible mechanism is proposed on the basis of the kinetic study.
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