(E)-(2-Bromoethenyl)dibromoborane, prepared readily by the bromoboration of acetylene with tribromoborane, can be used as an effective precursor for the stereoselective synthesis of (E)-1,2-disubstituted ethenes.
β‐Bromovinyldibromoborane (III), prepared from acetylene (I) and boron tribromide (II), reacts with the organozinc chlorides (IV) in the presence of a Pd(0) catalyst, generated from PdCl2(PPh3)2 in situ, to give the 1‐alkenylboron dibromides (V).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.