DirectC(sp(3))-Hborylation of amides, ureas, and 2-aminopyridine derivatives at the position α to the N atom, which gives the corresponding α-aminoalkylboronates, has been achieved with a heterogeneous catalyst system consisting of [Rh(OMe)(cod)]2 and a silica-supported triarylphosphine ligand (Silica-TRIP) that features an immobilized triptycene-type cage structure with a bridgehead P atom. The
Ruthenium(II) Biscarboxylate-Catalyzed Borylations of C(sp<sup>2</sup>
)−H and C(sp<sup>3</sup>
)−H Bonds
作者:Suman De Sarkar、N. Y. Phani Kumar、Lutz Ackermann
DOI:10.1002/chem.201604943
日期:2017.1.1
Versatile borylations of C(sp2)−H and C(sp3)−H were achieved with ruthenium(II) biscarboxylate complexes. The robust nature of the ruthenium(II) catalyst enabled C(sp3)−Hborylation on pyrrolidines, piperidines, and azepanes with ample scope and excellent positional selectivity control.