
pmid: 28543938
AbstractA simple and efficient method for determination of the yield, enantiomeric/diasteriomeric excess (ee/de), and absolute configuration of crude chiral diols without the need of work‐up and product isolation in a high throughput setting is described. This approach utilizes a self‐assembled iminoboronate ester formed as a product by dynamic covalent self‐assembly of a chiral diol with an enantiopure fluorescent amine such as tryptophan methyl ester or tryptophanol and 2‐formylphenylboronic acid. The resulting diastereomeric boronates display different photophysical properties and allow for fluorescence‐based ee determination of molecules containing a 1,2‐ or 1,3‐diol moiety. This method has been utilized for the screening of ee in a number of chiral diols including atorvastatin, a statin used for the treatment of hypercholesterolemia. Noyori asymmetric hydrogenation of benzil was performed in a highly parallel fashion with errors <1 % ee confirming the feasibility of the systematic examination of crude products from the parallel asymmetric synthesis in real time and in a high‐throughput screening (HTS) fashion.
/dk/atira/pure/subjectarea/asjc/1600/1600; name=General Chemistry, enantiomeric excess, asymmetric catalysis, diols, fluorescence, self-assembly
/dk/atira/pure/subjectarea/asjc/1600/1600; name=General Chemistry, enantiomeric excess, asymmetric catalysis, diols, fluorescence, self-assembly
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