Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... The aldol reaction of formaldehyde with the dicyclopentylborinyl enolate derived from -(or -) 1-tert-butyldimethylsilyloxy-l-cyclohexylbutan-2-one, followed by desilylation and sodium meta-periodate oxidation, provides -(or -) β-hydroxyisobutyric acid.