Schaus, Scott E.; Brandes, Bridget D.; Larrow, Jay F.; Tokunaga, Makoto; Hansen, Karl B.; Gould, Alexandra E.; Furrow, Michael E.; Jacobsen, Eric N. published an article on February 20 ,2002. The article was titled 《Highly Selective Hydrolytic Kinetic Resolution of Terminal Epoxides Catalyzed by Chiral (salen)CoIII Complexes. Practical Synthesis of Enantioenriched Terminal Epoxides and 1,2-Diols》, and you may find the article in Journal of the American Chemical Society.Recommanded Product: (1S)-1-(2-chlorophenyl)ethane-1,2-diol The information in the text is summarized as follows:
The hydrolytic kinetic resolution (HKR) of terminal epoxides catalyzed by a chiral (salen)CoIII complex affords both recovered unreacted epoxide and 1,2-diol product in highly enantioenriched form. As such, the HKR provides general access to useful, highly enantioenriched chiral building blocks that are otherwise difficult to access, from inexpensive racemic materials. The reaction has several appealing features from a practical standpoint, including the use of H2O as a reactant and low loadings (0.2-2.0 mol %) of a recyclable, com. available catalyst. In addition, the HKR displays extraordinary scope, as a wide assortment of sterically and electronically varied epoxides can be resolved to ≥99% ee. The corresponding 1,2-diols were produced in good-to-high enantiomeric excess using 0.45 equiv of H2O. Useful and general protocols are provided for the isolation of highly enantioenriched epoxides and diols, as well as for catalyst recovery and recycling. Selectivity factors (krel) were determined for the HKR reactions by measuring the product ee at ca. 20% conversion. In nearly all cases, krel values for the HKR exceed 50, and in several cases are well in excess of 200. The experimental part of the paper was very detailed, including the reaction process of (1S)-1-(2-chlorophenyl)ethane-1,2-diol(cas: 133082-13-0Recommanded Product: (1S)-1-(2-chlorophenyl)ethane-1,2-diol)
(1S)-1-(2-chlorophenyl)ethane-1,2-diol(cas: 133082-13-0) belongs to hydroxy-containing compounds. Hydroxy groups participate in the dehydration reactions that link simple biological molecules into long chains. The creation of a peptide bond to link two amino acids to make a protein removes the −OH from the carboxy group of one amino acid.Recommanded Product: (1S)-1-(2-chlorophenyl)ethane-1,2-diol
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