The ready synthesis and ease of handling of dialkylboron chlorides, R2BC1, compared to triflates, R2BOTf, give the chlorides a significant advantage as reagents to achieve the conversion of ketones into enol borinates, regiospecifically and quantitatively. This made possible the first study of the effect of changes in the leaving group on the ratios of (£')-:(Z)-enol borinates produced.
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