Alkaline-Earth-Catalyzed Dehydrocoupling of Amines and Boranes
نویسندگان
چکیده
Dehydrocoupling reactions between the boranes HBpin and 9-borabicyclo[3.3.1]nonane and a range of amines and anilines ensue under very mild reaction conditions in the presence of a simple β-diketiminato magnesium n-butyl precatalyst. The facility of the reactions is suggested to be a function of the Lewis acidity of the borane substrate, and is dictated by resultant pre-equilibria between, and the relative stability of, magnesium hydride and borohydride intermediates during the course of the catalysis.
منابع مشابه
Bespoke synthesis of unsymmetrical diaminoboranes by alkaline earth catalysis.
Heavier group 2 (Mg, Ca) bis(trimethylsilyl)amides are catalysts for the formation of unsymmetrical diaminoboranes, [(R(2)N)BH(NR'(2))], by dehydrocoupling of amine boranes and protic amines; a process which is proposed to occur by a sequential metal-centred elimination-insertion-elimination mechanism.
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