Diarylmethanol 1, and acetate derivative 2, are key chiral intermediates for the preparation of mGlu2 receptor potentiators.  Formation of 1 via a racemic Grignard protocol followed by chiral chromatography was acceptable for multi-gram scale purposes.  However, for multi-kilogram amounts, an asymmetric synthesis of 1 was required.  After evaluating enzymatic resolutions, asymmetric hydrogenations, and chiral hydridic reductions (e.g. CBS reagents), enantioselective aryl transfer chemistry was developed to afford the desired diarylmethanol.  The process involved preparing a proposed arylalkylzinc species from a boroxine and diethylzinc, followed by reaction with the appropriate aldehyde in the presence of a chiral ligand.  While optimizing this chemistry, an understanding of stoichiometry and reaction times was gained through the use of React-IR and analysis of off-gases via real time gas analysis/mass spectrometry.  Ultimately, crystalline 2 was obtained in high yield with >99% ee.