An efficient protocol for the evaluation of catalysts for the asymmetric Morita-Baylis-Hillman (MBH) reaction was developed. By mass spectrometric back-reaction screening of quasi-enantiomeric MBH products, an efficient bifunctional phosphine catalyst was identified that outperforms literature-known catalysts in the MBH reaction of methyl acrylate with aldehydes. The close match between the selectivities measured for the forward and back reaction and kinetic measurements provided strong evidence that the aldol step and not the subsequent proton transfer is rate- and enantioselectivity-determining.
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Publication date: October 2017 Source: International Journal of Biological Macromolecules, Volume 103 Author(s): Mingan Yu, Duqiang Liu, ...
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Abstract Endurance exercise generates CO 2 via aerobic metabolism; however, its role remains unclear. Exogenous CO 2 by transcutaneous d...
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FS Teni, AS Surur, A Hailemariam, A Aye, G Mitiku, AE Gurmu, B Tessema Annals of Medical and Health Sciences Research 2015 5(6):454-460 ...
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Abstract Background Studies exploring the association between physical activity, screen time and sleep and pain usually focus on a limit...
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One third of adult patients with orthognathic surgery of a prognathic or retrognathic mandible show relapse. The sagittal split osteotomy of...
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Medicine by Alexandros G. Sfakianakis BioMed Research International BioMed Research InternationalTanshinone IIA Alleviates CCL2-Induced Le...
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We present a small-scale fading analysis of the vehicular-to-vehicular (V2V) propagation channel at 5.9 GHz when both the transmitter (Tx) a...
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The nanoanalytical high resolution TEM/STEM investigation of the intergranular grain boundary phase of anisotropic sintered and rapidly quen...
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