Bar, Grégory L. J. Lloyd-Jones, Guy C. Booker-Milburn, Kevin I. Pd(II)-Catalyzed Intermolecular 1,2-Diamination of Conjugated Dienes A Pd(II) chloride precatalyst, in the presence of 1 equiv of benzoquinone, effects highly efficient, regioselective 1,2-diamination of 1,3-dienes using dialkyl ureas under mild conditions. There is no requirement for a large excess of diene. requirement;presence;Conjugated Dienes;diene;Pd;benzoquinone;regioselective;precatalyst;chloride;dialkyl ureas;Diamination;1 equiv;Intermolecular;diamination 2005-05-25
    https://acs.figshare.com/articles/journal_contribution/Pd_II_Catalyzed_Intermolecular_1_2_Diamination_of_Conjugated_Dienes/3285010
10.1021/ja051181d.s002