Synthesis of new boron complexes: application to transfer hydrogenation of acetophenone derivatives |
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| Authors: | Ahmet Kilic,Cezmi Kayan,Murat Aydemir,Feyyaz Durap,Mustaf1 Durgun,Akı n Baysal,Esref Tas,Bahattin Gü mgü m |
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| Affiliation: | 1. Harran University, Department of Chemistry, 63190, Sanliurfa, Turkey;2. Dicle University, Department of Chemistry, 21280 Diyarbak?r, Turkey;3. Siirt University, Department of Chemistry, 56100 Siirt, Turkey |
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| Abstract: | Two new boron complexes were synthesized from N‐[3‐(methylmercapto)aniline]‐3,5‐di‐tert‐butylsalicylaldimine ( LH ) with boron reagent BPh3 or BF3.Et2O. These boron complexes are stable and easily soluble in protic solvents such as ethanol (C2H5OH) but hardly soluble in nonprotic solvents such as chloroform (CHCl3), dichloromethane (CH2Cl2) and tetrahydrofuran (THF). All new boron complexes have been fully characterized by both analytical and spectroscopic methods. The catalytic activities of complexes [LBPh2], 2 , and [LBF2], 3 , in the transfer hydrogenation of acetophenone derivatives were tested. Stable boron complexes were found to be efficient catalysts in the transfer hydrogenation of aromatic ketones in good conversions up to 99% in the presence of iso‐PrOH/KOH. Copyright © 2011 John Wiley & Sons, Ltd. |
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| Keywords: | boron complexes transfer hydrogenation BPh3 BF3.Et2O synthesis |
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