Abstract
Abstract Triallylborane adds to the N N double bond of pyrazolines 1 and 2 at 0 °C giving after deboronation the corresponding N -allylpyrazolidines 4 and 5 . Further transformations of allylpyrazolidine 4 including the cyclopropane ring opening were studied. Allylboration of azobenzene with triallylborane gives rise to 1-allyl-1,2-diphenylhydrazine.
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