Abstract
Sterically demanding α-methyl- and α-trifluoromethyl-mandelic esters 5a and 6a were conveniently resolved on a large scale by a protease from Aspergillus oryzae leading to both enantiomers of atrolactic acid 5b and a precursor of Mosher's acid 6b in 75–88% e.e. Single recrystallisation led to optically pure material.
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