Abstract: In contrast with terminal hydrocarbon olefins, the hydroboration of certain N- alkenylureas and N-alkenylcarbamates ceases to an appreciable extent at the monoalkylborane stage. This is indicated by the hy-drolysis of these intermediate organoboranes to the corresponding substituted aminoalkylboronic acids. he preparation of a variety of functionally sub-T stituted alkylboronic acids has been limited as a result of the ...