Highly Chemo- and Stereoselective Transfer Semihydrogenation of Alkynes Catalyzed by a Stable, Well-Defined Manganese(II) Complex
作者:Aleksandra Brzozowska、Luis Miguel Azofra、Viktoriia Zubar、Iuliana Atodiresei、Luigi Cavallo、Magnus Rueping、Osama El-Sepelgy
DOI:10.1021/acscatal.8b00983
日期:2018.5.4
unprecedented manganese-catalyzed semihydrogenation of internal alkynes to (Z)-alkenes using ammonia borane as a hydrogen donor. The reaction is catalyzed by a pincer complex of the earth-abundant manganese(II) salt in the absence of any additives, base, or superhydride. The ammonia borane smoothly reduces the manganese precatalyst [Mn(II)–PNP][Cl]2 to the catalytically activespecies [Mn(I)–PNP]–hydride in the