Alberico, Elisabetta and Karandikar, Satyajit Anand and Gladiali, Serafino Gabriele (2010) Dimethoxydibenzophosphepine: an axially chiral monophosphane for efficient asymmetric catalysis. ChemCatChem, Vol. 2 (11), p. 1395-1398. eISSN 1867-3899. Article.
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A novel axially chiral phosphepine constructed on a diphenyl template is prepared in four steps. Resolution with the aid of menthyl chloroformate at the intermediate bisphenol stage affords the pure (R)-enantiomer, the cationic RI complex of which is an active and stereoselective catalyst for the hydrogenation and transfer hydrogenation of α,β-unsaturated acid derivatives with 94–96 % ee.
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