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. ... Allenoxyborinates, easily generated via the 1,4-addition of dicyclohexylborane to α,β-acetylenic ketones, react in situ with excess starting ketone to afford stereodefined, functionalized trisubstituted olefins in high yields. ... Allenoxyborinates, easily generated via the 1,4-addition of ...