Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn¡¯t involve a screen. 21436-03-3, C6H14N2. A document type is Article, introducing its new discovery., Application In Synthesis of (1S,2S)-Cyclohexane-1,2-diamine
A highly potential analogue of Jacobsen catalyst with in-built phase transfer capability in enantioselective epoxidation of nonfunctionalized alkenes
A new analogue of Jacobsen MnIII SALEN epoxidation catalysts having in-built phase transfer capability by means of introducing tertiary amino alkyl groups at the 5,5?-position of the Salen ligand were used as catalysts for the liquid-phase enantioselective epoxidation of 2,2-dimethyl-6-cyano chromene, indene, and styrene in the presence of O-coordinating axial bases with NaOCl as an oxidant under biphasic reaction conditions. Excellent conversions were obtained with catalyst loading in the range 0.4-2.0 mol% in all alkenes, but high chiral induction (EEs > 99%) was obtained only in the case of 2,2-dimethyl-6-cyano chromene. The enhanced activity of these complexes is attributed to the presence of t-alkyl amines in the Salen ligand, imparting in-built phase transfer capability to the catalyst.
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Reference£º
Chiral Catalysts,
Chiral catalysts – SlideShare